Exhibit 12.1 USX Corporation Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends TOTAL ENTERPRISE BASIS--Unaudited(a) Continuing Operations (Dollars in Millions) Year Ended December 31 ----------------------------------------- 1997 1996 1995 1994 1993 ------ ------ ----- ------ ------ Portion of rentals representing interest....... $ 82 $ 78 $ 76 $ 83 $ 81 Capitalized interest........................... 31 11 13 58 105 Other interest and fixed charges............... 312 382 452 456 365 Pretax earnings which would be required to cover preferred stock dividend requirements of parent..................................... 20 36 46 49 44 ------ ------ ----- ------ ----- Combined fixed charges and preferred stock dividends (A)................................. $ 445 $ 507 $ 587 $ 646 $ 595 ====== ====== ===== ====== ===== Earnings-pretax income (loss) with applicable adjustments (B).................... $1,745 $1,837 $ 877 $1,300 $ 239 ====== ====== ===== ====== ===== Ratio of (B) to (A)............................ 3.92 3.62 1.49 2.01 (b) ====== ====== ===== ====== ===== - ------------------- (a) Amounts in prior years have been reclassified to conform to 1997 classifications. (b) Earnings did not cover fixed charges and preferred stock dividends by $356 million for 1993.