EXHIBIT 12(b) RATIO OF EARNINGS TO FIXED CHARGES Union Pacific Corporation and Subsidiary Companies (Unaudited) <Table> <Caption> - ----------------------------------------------------------------------------------------------------- Six Months Ended June 30, Millions of Dollars, Except Ratios 2002 2001 - ----------------------------------------------------------------------------------------------------- Earnings: Net income ................................................ $ 526 $ 424 Undistributed equity earnings ............................. (21) (15) -------- -------- Total earnings .................................................. 505 409 -------- -------- Income taxes .................................................... 309 255 -------- -------- Fixed charges: Interest expense including amortization of debt discount .. 322 359 Portion of rentals representing an interest factor ........ 22 20 -------- -------- Total fixed charges ............................................. 344 379 -------- -------- Earnings available for fixed charges ............................ $ 1,158 $ 1,043 -------- -------- Ratio of earnings to fixed charges .............................. 3.4 2.8 -------- -------- </Table>