Home / 87,490.53-130,553.10-78,065.64

Finding the Fourth Proportional to 87,490.53, 130,553.10 and 78,065.64

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Solution

The fourth proportional to 87,490.53, 130,553.10 and 78,065.64 is: 116,489.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,490.53 : 130,553.10 = 78,065.64 : x
  2. Step 2: Convert to fraction form
    87,490.53/130,553.10 = 78,065.64/x
  3. Step 3: Cross multiply
    87,490.53x = 130,553.10 × 78,065.64
  4. Step 4: Simplify right side
    87,490.53x = 10,191,711,305.48
  5. Step 5: Solve for x
    x = 10,191,711,305.48/87,490.53
  6. Step 6: Final answer
    x = 116,489.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.