Answer:
138 pound
Explanation:
Given
A certain medicine is given in an amount proportional to a patients body weight.
thus,
ratio will be
amount of medicine: weight of patient
Given
Suppose a person weighted 104 pounds requires 156 milligrams of medicine.
amount of medicine = 156 milligram
weight of patient = 104 pound
Thus, ratio will be = 156/104
___________________________
What is the weight of a patient who requires 207 milligrams of medicine
Let the weight of weight of patient here be x
thus, ratio in this case will be
207/x
we also know in ratio and proportion that
if two ratio a:b and c:d are equal then a:c = c:d
here also the ratio will be same
Thus,
156/104 = 207/x
=> 156x = 207*104 = 21,528
=> x = 21,528/156 = 138
Thus, weight of patient is 138 pound.