Home / 87,758.20-131,637.30-86,008.60

Finding the Fourth Proportional to 87,758.20, 131,637.30 and 86,008.60

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Solution

The fourth proportional to 87,758.20, 131,637.30 and 86,008.60 is: 129,012.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,758.20 : 131,637.30 = 86,008.60 : x
  2. Step 2: Convert to fraction form
    87,758.20/131,637.30 = 86,008.60/x
  3. Step 3: Cross multiply
    87,758.20x = 131,637.30 × 86,008.60
  4. Step 4: Simplify right side
    87,758.20x = 11,321,939,880.78
  5. Step 5: Solve for x
    x = 11,321,939,880.78/87,758.20
  6. Step 6: Final answer
    x = 129,012.90

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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.