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Finding the Fourth Proportional to 134.85, 201.89 and 76.97

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Solution

The fourth proportional to 134.85, 201.89 and 76.97 is: 115.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.85 : 201.89 = 76.97 : x
  2. Step 2: Convert to fraction form
    134.85/201.89 = 76.97/x
  3. Step 3: Cross multiply
    134.85x = 201.89 × 76.97
  4. Step 4: Simplify right side
    134.85x = 15,540.17
  5. Step 5: Solve for x
    x = 15,540.17/134.85
  6. Step 6: Final answer
    x = 115.24

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Why These Related Problems?

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