Question

A certain medicine is given in an amount proportional to a patient's body weight. Suppose a patient weighing

140
pounds requires
147
milligrams of medicine. What is the weight of a patient who requires
194.25
milligrams of medicine?

Answer 1

140 / 147 = x / 194.25.....140 lbs to 147 mg = x lbs to 194.25 mg
cross multiply because this is a proportion
(147)(x) = (140)(194.25)
147x = 27195
x = 27195 / 147
x = 185 <=== the weight of the patient is 185 lbs