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Finding the Fourth Proportional to 134.52, 185.48 and 85.38

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Solution

The fourth proportional to 134.52, 185.48 and 85.38 is: 117.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.52 : 185.48 = 85.38 : x
  2. Step 2: Convert to fraction form
    134.52/185.48 = 85.38/x
  3. Step 3: Cross multiply
    134.52x = 185.48 × 85.38
  4. Step 4: Simplify right side
    134.52x = 15,836.28
  5. Step 5: Solve for x
    x = 15,836.28/134.52
  6. Step 6: Final answer
    x = 117.72

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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.