Finding the Fourth Proportional to 81,454,331.70, 122,181,497.55 and 72,526,122.90
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Solution
The fourth proportional to 81,454,331.70, 122,181,497.55 and 72,526,122.90 is: 108,789,184.35
Step by Step Solution
- Step 1: Write the proportion equation
81,454,331.70 : 122,181,497.55 = 72,526,122.90 : x - Step 2: Convert to fraction form
81,454,331.70/122,181,497.55 = 72,526,122.90/x - Step 3: Cross multiply
81,454,331.70x = 122,181,497.55 × 72,526,122.90 - Step 4: Simplify right side
81,454,331.70x = 8,861,350,307,417,349 - Step 5: Solve for x
x = 8,861,350,307,417,349/81,454,331.70 - Step 6: Final answer
x = 108,789,184.35
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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.