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Finding the Fourth Proportional to 198.20, 273.57 and 124.54

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Solution

The fourth proportional to 198.20, 273.57 and 124.54 is: 171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.20 : 273.57 = 124.54 : x
  2. Step 2: Convert to fraction form
    198.20/273.57 = 124.54/x
  3. Step 3: Cross multiply
    198.20x = 273.57 × 124.54
  4. Step 4: Simplify right side
    198.20x = 34,070.41
  5. Step 5: Solve for x
    x = 34,070.41/198.20
  6. Step 6: Final answer
    x = 171.90

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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.