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Finding the Fourth Proportional to 87,257.60, 131,080.80 and 83,715.20

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Solution

The fourth proportional to 87,257.60, 131,080.80 and 83,715.20 is: 125,759.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,257.60 : 131,080.80 = 83,715.20 : x
  2. Step 2: Convert to fraction form
    87,257.60/131,080.80 = 83,715.20/x
  3. Step 3: Cross multiply
    87,257.60x = 131,080.80 × 83,715.20
  4. Step 4: Simplify right side
    87,257.60x = 10,973,455,388.16
  5. Step 5: Solve for x
    x = 10,973,455,388.16/87,257.60
  6. Step 6: Final answer
    x = 125,759.31

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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.