As a nurse part of your daily duties is to mix medications i

As a nurse, part of your daily duties is to mix medications in the proper proportions for your patients. For one of your regular patients, you always mix Medication A with Medication B in the same proportion. Last week, your patient\'s doctor indicated that you should mix 70 milligrams of Medication A with 63 milligrams of Medication B. However this week, the doctor said to only use 45 milligrams of Medication B. How many milligrams of Medication A should be mixed this week?

Solution

The ratio of medication A to medication B as per the doctor\'s last prescription is 70: 63 = 10: 9. Now, if 45 mg of medication B is to be used, the quantity of medication A required to be mixed is 45 *10/9 = 50mg.