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Finding the Fourth Proportional to 136.92, 187.62 and 131.88

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Solution

The fourth proportional to 136.92, 187.62 and 131.88 is: 180.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.92 : 187.62 = 131.88 : x
  2. Step 2: Convert to fraction form
    136.92/187.62 = 131.88/x
  3. Step 3: Cross multiply
    136.92x = 187.62 × 131.88
  4. Step 4: Simplify right side
    136.92x = 24,743.33
  5. Step 5: Solve for x
    x = 24,743.33/136.92
  6. Step 6: Final answer
    x = 180.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.