Home / 81,306.46-121,963.78-25,906.78

Finding the Fourth Proportional to 81,306.46, 121,963.78 and 25,906.78

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Solution

The fourth proportional to 81,306.46, 121,963.78 and 25,906.78 is: 38,861.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,306.46 : 121,963.78 = 25,906.78 : x
  2. Step 2: Convert to fraction form
    81,306.46/121,963.78 = 25,906.78/x
  3. Step 3: Cross multiply
    81,306.46x = 121,963.78 × 25,906.78
  4. Step 4: Simplify right side
    81,306.46x = 3,159,688,816.43
  5. Step 5: Solve for x
    x = 3,159,688,816.43/81,306.46
  6. Step 6: Final answer
    x = 38,861.47

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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.