Home / 81,948.91-122,942.38-25,787.56

Finding the Fourth Proportional to 81,948.91, 122,942.38 and 25,787.56

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Solution

The fourth proportional to 81,948.91, 122,942.38 and 25,787.56 is: 38,687.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,948.91 : 122,942.38 = 25,787.56 : x
  2. Step 2: Convert to fraction form
    81,948.91/122,942.38 = 25,787.56/x
  3. Step 3: Cross multiply
    81,948.91x = 122,942.38 × 25,787.56
  4. Step 4: Simplify right side
    81,948.91x = 3,170,384,000.79
  5. Step 5: Solve for x
    x = 3,170,384,000.79/81,948.91
  6. Step 6: Final answer
    x = 38,687.32

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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.