Home / 87,385.20-130,964.40-40,538.40

Finding the Fourth Proportional to 87,385.20, 130,964.40 and 40,538.40

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Solution

The fourth proportional to 87,385.20, 130,964.40 and 40,538.40 is: 60,754.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,385.20 : 130,964.40 = 40,538.40 : x
  2. Step 2: Convert to fraction form
    87,385.20/130,964.40 = 40,538.40/x
  3. Step 3: Cross multiply
    87,385.20x = 130,964.40 × 40,538.40
  4. Step 4: Simplify right side
    87,385.20x = 5,309,087,232.96
  5. Step 5: Solve for x
    x = 5,309,087,232.96/87,385.20
  6. Step 6: Final answer
    x = 60,754.99

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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.