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Finding the Fourth Proportional to 87,694.40, 131,560.80 and 43,342.40

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Solution

The fourth proportional to 87,694.40, 131,560.80 and 43,342.40 is: 65,023.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,694.40 : 131,560.80 = 43,342.40 : x
  2. Step 2: Convert to fraction form
    87,694.40/131,560.80 = 43,342.40/x
  3. Step 3: Cross multiply
    87,694.40x = 131,560.80 × 43,342.40
  4. Step 4: Simplify right side
    87,694.40x = 5,702,160,817.92
  5. Step 5: Solve for x
    x = 5,702,160,817.92/87,694.40
  6. Step 6: Final answer
    x = 65,023.09

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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.