Home / 87,979.40-131,882.70-78,648.20

Finding the Fourth Proportional to 87,979.40, 131,882.70 and 78,648.20

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Solution

The fourth proportional to 87,979.40, 131,882.70 and 78,648.20 is: 117,895.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,979.40 : 131,882.70 = 78,648.20 : x
  2. Step 2: Convert to fraction form
    87,979.40/131,882.70 = 78,648.20/x
  3. Step 3: Cross multiply
    87,979.40x = 131,882.70 × 78,648.20
  4. Step 4: Simplify right side
    87,979.40x = 10,372,336,966.14
  5. Step 5: Solve for x
    x = 10,372,336,966.14/87,979.40
  6. Step 6: Final answer
    x = 117,895.06

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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.