Home / 87,721.40-131,711.70-68,022.20

Finding the Fourth Proportional to 87,721.40, 131,711.70 and 68,022.20

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Solution

The fourth proportional to 87,721.40, 131,711.70 and 68,022.20 is: 102,133.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,721.40 : 131,711.70 = 68,022.20 : x
  2. Step 2: Convert to fraction form
    87,721.40/131,711.70 = 68,022.20/x
  3. Step 3: Cross multiply
    87,721.40x = 131,711.70 × 68,022.20
  4. Step 4: Simplify right side
    87,721.40x = 8,959,319,599.74
  5. Step 5: Solve for x
    x = 8,959,319,599.74/87,721.40
  6. Step 6: Final answer
    x = 102,133.80

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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.