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Finding the Fourth Proportional to 136.27, 203.45 and 126.82

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Solution

The fourth proportional to 136.27, 203.45 and 126.82 is: 189.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.27 : 203.45 = 126.82 : x
  2. Step 2: Convert to fraction form
    136.27/203.45 = 126.82/x
  3. Step 3: Cross multiply
    136.27x = 203.45 × 126.82
  4. Step 4: Simplify right side
    136.27x = 25,801.53
  5. Step 5: Solve for x
    x = 25,801.53/136.27
  6. Step 6: Final answer
    x = 189.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.