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 6/30/97 1996 1995 1994 1993 1992 Earnings: Net income $37,466 $38,630 $32,109 $34,596 $28,534 $25,743 Adjustments: Income taxes 21,483 22,568 18,630 17,977 16,030 12,800 Fixed charges (see below) 17,381 16,844 16,395 16,986 17,556 15,642 Total adjusted earnings $76,330 $78,042 $67,134 $69,559 $62,120 $54,185 Fixed charges: Total interest expense $16,427 $15,907 $15,530 $16,037 $16,640 $14,556 Interest component of rents 954 937 865 949 916 1,086 Total fixed charges $17,381 $16,844 $16,395 $16,986 $17,556 $15,642 Ratio of earnings to fixed charges 4.4 4.6 4.1 4.1 3.5 3.5