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Finding the Fourth Proportional to 87,873, 131,811.72 and 31,717.92

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Solution

The fourth proportional to 87,873, 131,811.72 and 31,717.92 is: 47,577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,873 : 131,811.72 = 31,717.92 : x
  2. Step 2: Convert to fraction form
    87,873/131,811.72 = 31,717.92/x
  3. Step 3: Cross multiply
    87,873x = 131,811.72 × 31,717.92
  4. Step 4: Simplify right side
    87,873x = 4,180,793,590.02
  5. Step 5: Solve for x
    x = 4,180,793,590.02/87,873
  6. Step 6: Final answer
    x = 47,577.68

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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.