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Finding the Fourth Proportional to 136.28, 203.11 and 135.47

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Solution

The fourth proportional to 136.28, 203.11 and 135.47 is: 201.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.28 : 203.11 = 135.47 : x
  2. Step 2: Convert to fraction form
    136.28/203.11 = 135.47/x
  3. Step 3: Cross multiply
    136.28x = 203.11 × 135.47
  4. Step 4: Simplify right side
    136.28x = 27,515.48
  5. Step 5: Solve for x
    x = 27,515.48/136.28
  6. Step 6: Final answer
    x = 201.90

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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.