The number of milligrams of aluminum is 400 times the number of milligrams of gold in the body.
Explanation
Lets assume, the number of milligrams of aluminum is [tex]x[/tex] times the number of milligrams of gold in the body.
The body of a 154 pound person contains approximately 4 × 10⁻¹ milligrams of gold and 16 × 10¹ milligrams of aluminum.
So the equation will be...
[tex](4*10^-^1)*x= 16*10^1\\ \\ x= \frac{16*10^1}{4*10^-^1}= 4*10^2=400[/tex]
So, the number of milligrams of aluminum is 400 times the number of milligrams of gold in the body.