Finding the Fourth Proportional to 76,687.70, 115,031.55 and 72,313.70
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Solution
The fourth proportional to 76,687.70, 115,031.55 and 72,313.70 is: 108,470.55
Step by Step Solution
- Step 1: Write the proportion equation
76,687.70 : 115,031.55 = 72,313.70 : x - Step 2: Convert to fraction form
76,687.70/115,031.55 = 72,313.70/x - Step 3: Cross multiply
76,687.70x = 115,031.55 × 72,313.70 - Step 4: Simplify right side
76,687.70x = 8,318,356,997.24 - Step 5: Solve for x
x = 8,318,356,997.24/76,687.70 - Step 6: Final answer
x = 108,470.55
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1.5x scale
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.