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Finding the Fourth Proportional to 100,695.14, 138,957.02 and 54,753.78

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Solution

The fourth proportional to 100,695.14, 138,957.02 and 54,753.78 is: 75,558.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,695.14 : 138,957.02 = 54,753.78 : x
  2. Step 2: Convert to fraction form
    100,695.14/138,957.02 = 54,753.78/x
  3. Step 3: Cross multiply
    100,695.14x = 138,957.02 × 54,753.78
  4. Step 4: Simplify right side
    100,695.14x = 7,608,422,102.54
  5. Step 5: Solve for x
    x = 7,608,422,102.54/100,695.14
  6. Step 6: Final answer
    x = 75,558.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.