Finding the Fourth Proportional to 71,908.80, 107,911.80 and 40,318.80
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Solution
The fourth proportional to 71,908.80, 107,911.80 and 40,318.80 is: 60,505.45
Step by Step Solution
- Step 1: Write the proportion equation
71,908.80 : 107,911.80 = 40,318.80 : x - Step 2: Convert to fraction form
71,908.80/107,911.80 = 40,318.80/x - Step 3: Cross multiply
71,908.80x = 107,911.80 × 40,318.80 - Step 4: Simplify right side
71,908.80x = 4,350,874,281.84 - Step 5: Solve for x
x = 4,350,874,281.84/71,908.80 - Step 6: Final answer
x = 60,505.45
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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.