ATHENS — Greece raised $5.15 billion from the sale of short-term treasury bills Tuesday, money that will help it make a crucial debt repayment at the end of the week.

With the disbursement of a massive $40.1 billion installment from Greece’s international bailout long delayed, the country’s finances have gone down to the wire. Without Tuesday’s sale, Athens would have found it impossible to repay the $6.4 billion treasury bill maturing on Friday, the day on which Prime Minister Antonis Samaras has said Greece would run out of money.