Finding the Fourth Proportional to 80,931,635.80, 121,397,453.70 and 72,428,579.80
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Solution
The fourth proportional to 80,931,635.80, 121,397,453.70 and 72,428,579.80 is: 108,642,869.70
Step by Step Solution
- Step 1: Write the proportion equation
80,931,635.80 : 121,397,453.70 = 72,428,579.80 : x - Step 2: Convert to fraction form
80,931,635.80/121,397,453.70 = 72,428,579.80/x - Step 3: Cross multiply
80,931,635.80x = 121,397,453.70 × 72,428,579.80 - Step 4: Simplify right side
80,931,635.80x = 8,792,645,162,827,255 - Step 5: Solve for x
x = 8,792,645,162,827,255/80,931,635.80 - Step 6: Final answer
x = 108,642,869.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.