Finding the Fourth Proportional to 80,933,691.80, 121,400,537.70 and 72,430,635.80
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Solution
The fourth proportional to 80,933,691.80, 121,400,537.70 and 72,430,635.80 is: 108,645,953.70
Step by Step Solution
- Step 1: Write the proportion equation
80,933,691.80 : 121,400,537.70 = 72,430,635.80 : x - Step 2: Convert to fraction form
80,933,691.80/121,400,537.70 = 72,430,635.80/x - Step 3: Cross multiply
80,933,691.80x = 121,400,537.70 × 72,430,635.80 - Step 4: Simplify right side
80,933,691.80x = 8,793,118,132,072,870 - Step 5: Solve for x
x = 8,793,118,132,072,870/80,933,691.80 - Step 6: Final answer
x = 108,645,953.70
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1.5x scale
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.