What is the ratio of 72 hours to 3 days?

To find the ratio of 72 hours to 3 days, we first need to convert both quantities to the same units. Since there are 24 hours in a day, 3 days is equal to 3 x 24 = 72 hours. Therefore, the ratio of 72 hours to 3 days is 72:3, which simplifies to 24:1.