Home / 87,311.91-131,059.48-77,380.20

Finding the Fourth Proportional to 87,311.91, 131,059.48 and 77,380.20

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Solution

The fourth proportional to 87,311.91, 131,059.48 and 77,380.20 is: 116,151.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311.91 : 131,059.48 = 77,380.20 : x
  2. Step 2: Convert to fraction form
    87,311.91/131,059.48 = 77,380.20/x
  3. Step 3: Cross multiply
    87,311.91x = 131,059.48 × 77,380.20
  4. Step 4: Simplify right side
    87,311.91x = 10,141,408,774.30
  5. Step 5: Solve for x
    x = 10,141,408,774.30/87,311.91
  6. Step 6: Final answer
    x = 116,151.49

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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.