Home / 87,415.20-120,631.68-49,171.86

Finding the Fourth Proportional to 87,415.20, 120,631.68 and 49,171.86

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Solution

The fourth proportional to 87,415.20, 120,631.68 and 49,171.86 is: 67,856.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,415.20 : 120,631.68 = 49,171.86 : x
  2. Step 2: Convert to fraction form
    87,415.20/120,631.68 = 49,171.86/x
  3. Step 3: Cross multiply
    87,415.20x = 120,631.68 × 49,171.86
  4. Step 4: Simplify right side
    87,415.20x = 5,931,684,080.52
  5. Step 5: Solve for x
    x = 5,931,684,080.52/87,415.20
  6. Step 6: Final answer
    x = 67,856.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.