Home / 87,390.28-130,881.30-80,333.56

Finding the Fourth Proportional to 87,390.28, 130,881.30 and 80,333.56

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Solution

The fourth proportional to 87,390.28, 130,881.30 and 80,333.56 is: 120,312.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,390.28 : 130,881.30 = 80,333.56 : x
  2. Step 2: Convert to fraction form
    87,390.28/130,881.30 = 80,333.56/x
  3. Step 3: Cross multiply
    87,390.28x = 130,881.30 × 80,333.56
  4. Step 4: Simplify right side
    87,390.28x = 10,514,160,766.43
  5. Step 5: Solve for x
    x = 10,514,160,766.43/87,390.28
  6. Step 6: Final answer
    x = 120,312.70

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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.