Home / 87,812.10-131,718.15-86,645.70

Finding the Fourth Proportional to 87,812.10, 131,718.15 and 86,645.70

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Solution

The fourth proportional to 87,812.10, 131,718.15 and 86,645.70 is: 129,968.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,812.10 : 131,718.15 = 86,645.70 : x
  2. Step 2: Convert to fraction form
    87,812.10/131,718.15 = 86,645.70/x
  3. Step 3: Cross multiply
    87,812.10x = 131,718.15 × 86,645.70
  4. Step 4: Simplify right side
    87,812.10x = 11,412,811,309.46
  5. Step 5: Solve for x
    x = 11,412,811,309.46/87,812.10
  6. Step 6: Final answer
    x = 129,968.55

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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.