Homework Help: math

Posted by jessica on Tuesday, August 24, 2010 at 9:21pm.

A certain medicine is given in an amount proportional to a patient’s body weight. Suppose that a patient weighing 100 pounds requires 125 milligrams of medicine. What is the weight of a patient who requires 200 milligrams of this medicine?
I am totally lost on how to work this problem. Someone please help!

math - Ms. Sue, Tuesday, August 24, 2010 at 9:36pm
Use a proportion, cross multiply, and solve for x.

100/125 = x/200

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