EXHIBIT 12 INDIANA GAS COMPANY, INC. AND SUBSIDIARY COMPANIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (In Thousands, Except Ratios) Twelve Mos. Ended Fiscal Year Ended September 30 3/31/96 1995 1994 1993 1992 1991 Earnings: Net income $42,927 $32,109 $34,596 $28,534 $25,743 $23,286 Adjustments: Income taxes 25,696 18,630 17,977 16,030 12,800 11,665 Fixed charges (see below) 16,724 16,395 16,986 17,556 15,642 15,482 Total adjusted earnings $85,347 $67,134 $69,559 $62,120 $54,185 $50,433 Fixed charges: Total interest expense $15,787 $15,530 $16,037 $16,640 $14,556 $14,411 Interest component of rents 937 865 949 916 1,086 1,071 Total fixed charges $16,724 $16,395 $16,986 $17,556 $15,642 $15,482 Ratio of earnings to fixed charges 5.1 4.1 4.1 3.5 3.5 3.3