Finding the Fourth Proportional to 103,126.20, 154,430.10 and 76,687.80
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Solution
The fourth proportional to 103,126.20, 154,430.10 and 76,687.80 is: 114,838.95
Step by Step Solution
- Step 1: Write the proportion equation
103,126.20 : 154,430.10 = 76,687.80 : x - Step 2: Convert to fraction form
103,126.20/154,430.10 = 76,687.80/x - Step 3: Cross multiply
103,126.20x = 154,430.10 × 76,687.80 - Step 4: Simplify right side
103,126.20x = 11,842,904,622.78 - Step 5: Solve for x
x = 11,842,904,622.78/103,126.20 - Step 6: Final answer
x = 114,838.95
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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.