EXHIBIT 12.2 MIDAMERICAN FUNDING, LLC COMPUTATION OF PRO FORMA RATIOS OF EARNINGS TO FIXED CHARGES (In Thousands) (Unaudited) PRO FORMA ------------------------------------------------------------------ TWELVE MONTHS ENDED NINE MONTHS ENDED DECEMBER 31, 1998 SEPTEMBER 30, 1999 ------------------------------- ---------------------------------- SUPPLEMENTAL (a) SUPPLEMENTAL (a) -------------------- ----------------------- ADJUST- AS ADJUST- MENT ADJUSTED MENT AS ADJUSTED --------- ---------- --------- ------------- Income from continuing operations........................ $ 74,632 $ -- $ 74,632 $130,576 $ -- $130,576 Pre-tax (gain) loss of less than 50% owned persons ...... (720) -- (720) (365) -- (365) ---------- --------- ---------- ---------- --------- ------------- 73,912 -- 73,912 130,211 -- 130,211 ---------- --------- ---------- ---------- --------- ------------- Add (Deduct): Total income taxes....................................... 63,707 -- 63,707 98,493 -- 98,493 Interest on long-term debt............................... 122,395 2,931 125,326 88,034 1,733 89,767 Other interest charges................................... 12,682 -- 12,682 8,631 -- 8,631 Preferred stock dividends of subsidiary.................. 4,952 -- 4,952 3,716 -- 3,716 Preferred stock dividends of subsidiary trust ........... 7,980 -- 7,980 5,985 -- 5,985 Interest on leases....................................... 212 -- 212 136 -- 136 ---------- --------- ---------- ---------- --------- ------------- 211,928 2,931 214,859 204,995 1,733 206,728 ---------- --------- ---------- ---------- --------- ------------- EARNINGS AVAILABLE FOR FIXED CHARGES.................... 285,840 2,931 288,771 335,206 1,733 336,939 ---------- --------- ---------- ---------- --------- ------------- Fixed Charges: Interest on long-term debt............................... 122,395 2,931 125,326 88,034 1,733 89,767 Other interest charges................................... 12,682 -- 12,682 8,631 -- 8,631 Preferred stock dividends of subsidiary trust ........... 7,980 -- 7,980 5,985 -- 5,985 Interest on leases....................................... 212 -- 212 136 -- 136 ---------- --------- ---------- ---------- --------- ------------- Subtotal................................................ 143,269 2,931 146,200 102,786 1,733 104,519 ---------- --------- ---------- ---------- --------- ------------- Preferred stock dividends of subsidiary.................. 4,952 -- 4,952 3,716 -- 3,716 Ratio of net income before income taxes to net income ... 1.8005 -- 1.8005 1.7334 -- 1.7334 ---------- --------- ---------- ---------- --------- ------------- Preferred stock dividend requirements before income taxes................................................... 8,916 -- 8,916 6,441 -- 6,441 ---------- --------- ---------- ---------- --------- ------------- FIXED CHARGES........................................... $152,185 $2,931 $155,116 $109,227 $1,733 $110,960 ---------- --------- ---------- ---------- --------- ------------- RATIO OF EARNINGS TO FIXED CHARGES....................... 1.9 -- 1.9 3.1 -- 3.0 ========== ========= ========== ========== ========= ============= Note: (a) Amounts in the supplemental columns are to reflect MidAmerican Energy's portion of the net interest component of payments to Nebraska Public Power District under a long-term purchase agreement for one-half of the plant capacity from Cooper Nuclear Station.