Home / 87,687.60-131,725.80-84,145.20

Finding the Fourth Proportional to 87,687.60, 131,725.80 and 84,145.20

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Solution

The fourth proportional to 87,687.60, 131,725.80 and 84,145.20 is: 126,404.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,687.60 : 131,725.80 = 84,145.20 : x
  2. Step 2: Convert to fraction form
    87,687.60/131,725.80 = 84,145.20/x
  3. Step 3: Cross multiply
    87,687.60x = 131,725.80 × 84,145.20
  4. Step 4: Simplify right side
    87,687.60x = 11,084,093,786.16
  5. Step 5: Solve for x
    x = 11,084,093,786.16/87,687.60
  6. Step 6: Final answer
    x = 126,404.35

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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.