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Finding the Fourth Proportional to 84,722.56, 127,046.92 and 28,552.20

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Solution

The fourth proportional to 84,722.56, 127,046.92 and 28,552.20 is: 42,815.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,722.56 : 127,046.92 = 28,552.20 : x
  2. Step 2: Convert to fraction form
    84,722.56/127,046.92 = 28,552.20/x
  3. Step 3: Cross multiply
    84,722.56x = 127,046.92 × 28,552.20
  4. Step 4: Simplify right side
    84,722.56x = 3,627,469,069.22
  5. Step 5: Solve for x
    x = 3,627,469,069.22/84,722.56
  6. Step 6: Final answer
    x = 42,815.86

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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.