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Finding the Fourth Proportional to 84,635.52, 126,953.72 and 25,470.78

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Solution

The fourth proportional to 84,635.52, 126,953.72 and 25,470.78 is: 38,206.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,635.52 : 126,953.72 = 25,470.78 : x
  2. Step 2: Convert to fraction form
    84,635.52/126,953.72 = 25,470.78/x
  3. Step 3: Cross multiply
    84,635.52x = 126,953.72 × 25,470.78
  4. Step 4: Simplify right side
    84,635.52x = 3,233,610,272.30
  5. Step 5: Solve for x
    x = 3,233,610,272.30/84,635.52
  6. Step 6: Final answer
    x = 38,206.30

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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.