Home / 87,120.12-130,680.30-57,724.68

Finding the Fourth Proportional to 87,120.12, 130,680.30 and 57,724.68

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Solution

The fourth proportional to 87,120.12, 130,680.30 and 57,724.68 is: 86,587.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120.12 : 130,680.30 = 57,724.68 : x
  2. Step 2: Convert to fraction form
    87,120.12/130,680.30 = 57,724.68/x
  3. Step 3: Cross multiply
    87,120.12x = 130,680.30 × 57,724.68
  4. Step 4: Simplify right side
    87,120.12x = 7,543,478,499.80
  5. Step 5: Solve for x
    x = 7,543,478,499.80/87,120.12
  6. Step 6: Final answer
    x = 86,587.10

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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.