EXHIBIT 12(a) UNION PACIFIC CORPORATION AND SUBSIDIARY COMPANIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (UNAUDITED) Three Months Ended Sept. 30, ---------------------------- Millions, Except Ratios 2001 2000 - ----------------------- ------- ------- Earnings: Net income ............................................. $ 267 $ 256 Undistributed equity earnings .......................... (19) (16) ------- ------- Total earnings .............................................. 248 240 ------- ------- Income taxes ................................................ 163 150 ------- ------- Fixed charges: Interest expense including amortization of debt discount 175 181 Portion of rentals representing an interest factor ..... 10 45 ------- ------- Total fixed charges ......................................... 185 226 ------- ------- Earnings available for fixed charges ........................ $ 596 $ 616 ------- ------- Ratio of earnings to fixed charges .......................... 3.2 2.7 ------- -------