Home / 87,787.28-131,374.20-71,807.60

Finding the Fourth Proportional to 87,787.28, 131,374.20 and 71,807.60

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Solution

The fourth proportional to 87,787.28, 131,374.20 and 71,807.60 is: 107,460.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,787.28 : 131,374.20 = 71,807.60 : x
  2. Step 2: Convert to fraction form
    87,787.28/131,374.20 = 71,807.60/x
  3. Step 3: Cross multiply
    87,787.28x = 131,374.20 × 71,807.60
  4. Step 4: Simplify right side
    87,787.28x = 9,433,666,003.92
  5. Step 5: Solve for x
    x = 9,433,666,003.92/87,787.28
  6. Step 6: Final answer
    x = 107,460.51

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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.