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Finding the Fourth Proportional to 87,759.80, 131,639.70 and 65,727.80

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Solution

The fourth proportional to 87,759.80, 131,639.70 and 65,727.80 is: 98,591.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,759.80 : 131,639.70 = 65,727.80 : x
  2. Step 2: Convert to fraction form
    87,759.80/131,639.70 = 65,727.80/x
  3. Step 3: Cross multiply
    87,759.80x = 131,639.70 × 65,727.80
  4. Step 4: Simplify right side
    87,759.80x = 8,652,387,873.66
  5. Step 5: Solve for x
    x = 8,652,387,873.66/87,759.80
  6. Step 6: Final answer
    x = 98,591.70

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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.