Finding the Fourth Proportional to 81,678,663.20, 122,368,695.60 and 66,450,144.80
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Solution
The fourth proportional to 81,678,663.20, 122,368,695.60 and 66,450,144.80 is: 99,553,753.98
Step by Step Solution
- Step 1: Write the proportion equation
81,678,663.20 : 122,368,695.60 = 66,450,144.80 : x - Step 2: Convert to fraction form
81,678,663.20/122,368,695.60 = 66,450,144.80/x - Step 3: Cross multiply
81,678,663.20x = 122,368,695.60 × 66,450,144.80 - Step 4: Simplify right side
81,678,663.20x = 8,131,417,541,607,122 - Step 5: Solve for x
x = 8,131,417,541,607,122/81,678,663.20 - Step 6: Final answer
x = 99,553,753.98
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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.