Finding the Fourth Proportional to 81,497.20, 122,245.80 and 68,375.20
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Solution
The fourth proportional to 81,497.20, 122,245.80 and 68,375.20 is: 102,562.80
Step by Step Solution
- Step 1: Write the proportion equation
81,497.20 : 122,245.80 = 68,375.20 : x - Step 2: Convert to fraction form
81,497.20/122,245.80 = 68,375.20/x - Step 3: Cross multiply
81,497.20x = 122,245.80 × 68,375.20 - Step 4: Simplify right side
81,497.20x = 8,358,581,024.16 - Step 5: Solve for x
x = 8,358,581,024.16/81,497.20 - Step 6: Final answer
x = 102,562.80
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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.