Home / 87,816.20-131,724.30-86,280.20

Finding the Fourth Proportional to 87,816.20, 131,724.30 and 86,280.20

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Solution

The fourth proportional to 87,816.20, 131,724.30 and 86,280.20 is: 129,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,816.20 : 131,724.30 = 86,280.20 : x
  2. Step 2: Convert to fraction form
    87,816.20/131,724.30 = 86,280.20/x
  3. Step 3: Cross multiply
    87,816.20x = 131,724.30 × 86,280.20
  4. Step 4: Simplify right side
    87,816.20x = 11,365,198,948.86
  5. Step 5: Solve for x
    x = 11,365,198,948.86/87,816.20
  6. Step 6: Final answer
    x = 129,420.30

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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.