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Finding the Fourth Proportional to 87,001.80, 130,599.90 and 81,291.30

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Solution

The fourth proportional to 87,001.80, 130,599.90 and 81,291.30 is: 122,027.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,001.80 : 130,599.90 = 81,291.30 : x
  2. Step 2: Convert to fraction form
    87,001.80/130,599.90 = 81,291.30/x
  3. Step 3: Cross multiply
    87,001.80x = 130,599.90 × 81,291.30
  4. Step 4: Simplify right side
    87,001.80x = 10,616,635,650.87
  5. Step 5: Solve for x
    x = 10,616,635,650.87/87,001.80
  6. Step 6: Final answer
    x = 122,027.77

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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.