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Finding the Fourth Proportional to 187.72, 281.85 and 133.90

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Solution

The fourth proportional to 187.72, 281.85 and 133.90 is: 201.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.72 : 281.85 = 133.90 : x
  2. Step 2: Convert to fraction form
    187.72/281.85 = 133.90/x
  3. Step 3: Cross multiply
    187.72x = 281.85 × 133.90
  4. Step 4: Simplify right side
    187.72x = 37,739.72
  5. Step 5: Solve for x
    x = 37,739.72/187.72
  6. Step 6: Final answer
    x = 201.04

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.