Home / 87,612.60-131,246.10-81,391.80

Finding the Fourth Proportional to 87,612.60, 131,246.10 and 81,391.80

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Solution

The fourth proportional to 87,612.60, 131,246.10 and 81,391.80 is: 121,927.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,612.60 : 131,246.10 = 81,391.80 : x
  2. Step 2: Convert to fraction form
    87,612.60/131,246.10 = 81,391.80/x
  3. Step 3: Cross multiply
    87,612.60x = 131,246.10 × 81,391.80
  4. Step 4: Simplify right side
    87,612.60x = 10,682,356,321.98
  5. Step 5: Solve for x
    x = 10,682,356,321.98/87,612.60
  6. Step 6: Final answer
    x = 121,927.17

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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.