Home / 87,815.60-131,723.40-86,649.20

Finding the Fourth Proportional to 87,815.60, 131,723.40 and 86,649.20

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Solution

The fourth proportional to 87,815.60, 131,723.40 and 86,649.20 is: 129,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,815.60 : 131,723.40 = 86,649.20 : x
  2. Step 2: Convert to fraction form
    87,815.60/131,723.40 = 86,649.20/x
  3. Step 3: Cross multiply
    87,815.60x = 131,723.40 × 86,649.20
  4. Step 4: Simplify right side
    87,815.60x = 11,413,727,231.28
  5. Step 5: Solve for x
    x = 11,413,727,231.28/87,815.60
  6. Step 6: Final answer
    x = 129,973.80

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1.5x scale

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.