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Finding the Fourth Proportional to 87,612.70, 131,419.05 and 86,835.10

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Solution

The fourth proportional to 87,612.70, 131,419.05 and 86,835.10 is: 130,252.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,612.70 : 131,419.05 = 86,835.10 : x
  2. Step 2: Convert to fraction form
    87,612.70/131,419.05 = 86,835.10/x
  3. Step 3: Cross multiply
    87,612.70x = 131,419.05 × 86,835.10
  4. Step 4: Simplify right side
    87,612.70x = 11,411,786,348.66
  5. Step 5: Solve for x
    x = 11,411,786,348.66/87,612.70
  6. Step 6: Final answer
    x = 130,252.65

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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.