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Finding the Fourth Proportional to 198.22, 273.67 and 136.03

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Solution

The fourth proportional to 198.22, 273.67 and 136.03 is: 187.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.22 : 273.67 = 136.03 : x
  2. Step 2: Convert to fraction form
    198.22/273.67 = 136.03/x
  3. Step 3: Cross multiply
    198.22x = 273.67 × 136.03
  4. Step 4: Simplify right side
    198.22x = 37,226.31
  5. Step 5: Solve for x
    x = 37,226.31/198.22
  6. Step 6: Final answer
    x = 187.81

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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.