Home / 87,811.60-131,717.40-86,645.20

Finding the Fourth Proportional to 87,811.60, 131,717.40 and 86,645.20

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Solution

The fourth proportional to 87,811.60, 131,717.40 and 86,645.20 is: 129,967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,811.60 : 131,717.40 = 86,645.20 : x
  2. Step 2: Convert to fraction form
    87,811.60/131,717.40 = 86,645.20/x
  3. Step 3: Cross multiply
    87,811.60x = 131,717.40 × 86,645.20
  4. Step 4: Simplify right side
    87,811.60x = 11,412,680,466.48
  5. Step 5: Solve for x
    x = 11,412,680,466.48/87,811.60
  6. Step 6: Final answer
    x = 129,967.80

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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.