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Finding the Fourth Proportional to 87,251.72, 130,876.14 and 21,587.72

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Solution

The fourth proportional to 87,251.72, 130,876.14 and 21,587.72 is: 32,381.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,251.72 : 130,876.14 = 21,587.72 : x
  2. Step 2: Convert to fraction form
    87,251.72/130,876.14 = 21,587.72/x
  3. Step 3: Cross multiply
    87,251.72x = 130,876.14 × 21,587.72
  4. Step 4: Simplify right side
    87,251.72x = 2,825,317,465.00
  5. Step 5: Solve for x
    x = 2,825,317,465.00/87,251.72
  6. Step 6: Final answer
    x = 32,381.22

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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.