Home / 87,921.58-131,505.56-81,539.98

Finding the Fourth Proportional to 87,921.58, 131,505.56 and 81,539.98

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Solution

The fourth proportional to 87,921.58, 131,505.56 and 81,539.98 is: 121,960.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,921.58 : 131,505.56 = 81,539.98 : x
  2. Step 2: Convert to fraction form
    87,921.58/131,505.56 = 81,539.98/x
  3. Step 3: Cross multiply
    87,921.58x = 131,505.56 × 81,539.98
  4. Step 4: Simplify right side
    87,921.58x = 10,722,960,732.29
  5. Step 5: Solve for x
    x = 10,722,960,732.29/87,921.58
  6. Step 6: Final answer
    x = 121,960.51

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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.