Home / 87,820.20-131,729.76-28,655.91

Finding the Fourth Proportional to 87,820.20, 131,729.76 and 28,655.91

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Solution

The fourth proportional to 87,820.20, 131,729.76 and 28,655.91 is: 42,983.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,820.20 : 131,729.76 = 28,655.91 : x
  2. Step 2: Convert to fraction form
    87,820.20/131,729.76 = 28,655.91/x
  3. Step 3: Cross multiply
    87,820.20x = 131,729.76 × 28,655.91
  4. Step 4: Simplify right side
    87,820.20x = 3,774,836,146.88
  5. Step 5: Solve for x
    x = 3,774,836,146.88/87,820.20
  6. Step 6: Final answer
    x = 42,983.69

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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.