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Finding the Fourth Proportional to 87,939, 131,929.38 and 28,774.62

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Solution

The fourth proportional to 87,939, 131,929.38 and 28,774.62 is: 43,168.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,939 : 131,929.38 = 28,774.62 : x
  2. Step 2: Convert to fraction form
    87,939/131,929.38 = 28,774.62/x
  3. Step 3: Cross multiply
    87,939x = 131,929.38 × 28,774.62
  4. Step 4: Simplify right side
    87,939x = 3,796,217,776.34
  5. Step 5: Solve for x
    x = 3,796,217,776.34/87,939
  6. Step 6: Final answer
    x = 43,168.76

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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.