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Finding the Fourth Proportional to 87,891.90, 131,805.45 and 43,503.90

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Solution

The fourth proportional to 87,891.90, 131,805.45 and 43,503.90 is: 65,239.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,891.90 : 131,805.45 = 43,503.90 : x
  2. Step 2: Convert to fraction form
    87,891.90/131,805.45 = 43,503.90/x
  3. Step 3: Cross multiply
    87,891.90x = 131,805.45 × 43,503.90
  4. Step 4: Simplify right side
    87,891.90x = 5,734,051,116.26
  5. Step 5: Solve for x
    x = 5,734,051,116.26/87,891.90
  6. Step 6: Final answer
    x = 65,239.81

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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.