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Finding the Fourth Proportional to 134.38, 201.43 and 76.53

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Solution

The fourth proportional to 134.38, 201.43 and 76.53 is: 114.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.38 : 201.43 = 76.53 : x
  2. Step 2: Convert to fraction form
    134.38/201.43 = 76.53/x
  3. Step 3: Cross multiply
    134.38x = 201.43 × 76.53
  4. Step 4: Simplify right side
    134.38x = 15,415.44
  5. Step 5: Solve for x
    x = 15,415.44/134.38
  6. Step 6: Final answer
    x = 114.72

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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.