Finding the Fourth Proportional to 81,678,008.20, 122,367,713.10 and 66,449,489.80
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Solution
The fourth proportional to 81,678,008.20, 122,367,713.10 and 66,449,489.80 is: 99,552,771.70
Step by Step Solution
- Step 1: Write the proportion equation
81,678,008.20 : 122,367,713.10 = 66,449,489.80 : x - Step 2: Convert to fraction form
81,678,008.20/122,367,713.10 = 66,449,489.80/x - Step 3: Cross multiply
81,678,008.20x = 122,367,713.10 × 66,449,489.80 - Step 4: Simplify right side
81,678,008.20x = 8,131,272,103,487,776 - Step 5: Solve for x
x = 8,131,272,103,487,776/81,678,008.20 - Step 6: Final answer
x = 99,552,771.70
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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.