Home / 87,864.10-131,796.15-81,988.90

Finding the Fourth Proportional to 87,864.10, 131,796.15 and 81,988.90

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Solution

The fourth proportional to 87,864.10, 131,796.15 and 81,988.90 is: 122,983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,864.10 : 131,796.15 = 81,988.90 : x
  2. Step 2: Convert to fraction form
    87,864.10/131,796.15 = 81,988.90/x
  3. Step 3: Cross multiply
    87,864.10x = 131,796.15 × 81,988.90
  4. Step 4: Simplify right side
    87,864.10x = 10,805,821,362.74
  5. Step 5: Solve for x
    x = 10,805,821,362.74/87,864.10
  6. Step 6: Final answer
    x = 122,983.35

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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.