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Finding the Fourth Proportional to 87,791.91, 131,708.82 and 28,627.65

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Solution

The fourth proportional to 87,791.91, 131,708.82 and 28,627.65 is: 42,948.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,791.91 : 131,708.82 = 28,627.65 : x
  2. Step 2: Convert to fraction form
    87,791.91/131,708.82 = 28,627.65/x
  3. Step 3: Cross multiply
    87,791.91x = 131,708.82 × 28,627.65
  4. Step 4: Simplify right side
    87,791.91x = 3,770,514,000.87
  5. Step 5: Solve for x
    x = 3,770,514,000.87/87,791.91
  6. Step 6: Final answer
    x = 42,948.31

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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.