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Finding the Fourth Proportional to 198.13, 273.56 and 124.48

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Solution

The fourth proportional to 198.13, 273.56 and 124.48 is: 171.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.13 : 273.56 = 124.48 : x
  2. Step 2: Convert to fraction form
    198.13/273.56 = 124.48/x
  3. Step 3: Cross multiply
    198.13x = 273.56 × 124.48
  4. Step 4: Simplify right side
    198.13x = 34,052.13
  5. Step 5: Solve for x
    x = 34,052.13/198.13
  6. Step 6: Final answer
    x = 171.87

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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.