Finding the Fourth Proportional to 81,207,619.60, 121,811,429.40 and 40,251,233.20
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Solution
The fourth proportional to 81,207,619.60, 121,811,429.40 and 40,251,233.20 is: 60,376,849.80
Step by Step Solution
- Step 1: Write the proportion equation
81,207,619.60 : 121,811,429.40 = 40,251,233.20 : x - Step 2: Convert to fraction form
81,207,619.60/121,811,429.40 = 40,251,233.20/x - Step 3: Cross multiply
81,207,619.60x = 121,811,429.40 × 40,251,233.20 - Step 4: Simplify right side
81,207,619.60x = 4,903,060,251,204,737 - Step 5: Solve for x
x = 4,903,060,251,204,737/81,207,619.60 - Step 6: Final answer
x = 60,376,849.80
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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.