Finding the Fourth Proportional to 71,143.80, 106,715.70 and 66,535.80
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Solution
The fourth proportional to 71,143.80, 106,715.70 and 66,535.80 is: 99,803.70
Step by Step Solution
- Step 1: Write the proportion equation
71,143.80 : 106,715.70 = 66,535.80 : x - Step 2: Convert to fraction form
71,143.80/106,715.70 = 66,535.80/x - Step 3: Cross multiply
71,143.80x = 106,715.70 × 66,535.80 - Step 4: Simplify right side
71,143.80x = 7,100,414,472.06 - Step 5: Solve for x
x = 7,100,414,472.06/71,143.80 - Step 6: Final answer
x = 99,803.70
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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.