Home / 87,864.20-131,489.10-80,491.40

Finding the Fourth Proportional to 87,864.20, 131,489.10 and 80,491.40

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Solution

The fourth proportional to 87,864.20, 131,489.10 and 80,491.40 is: 120,455.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,864.20 : 131,489.10 = 80,491.40 : x
  2. Step 2: Convert to fraction form
    87,864.20/131,489.10 = 80,491.40/x
  3. Step 3: Cross multiply
    87,864.20x = 131,489.10 × 80,491.40
  4. Step 4: Simplify right side
    87,864.20x = 10,583,741,743.74
  5. Step 5: Solve for x
    x = 10,583,741,743.74/87,864.20
  6. Step 6: Final answer
    x = 120,455.68

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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.