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Finding the Fourth Proportional to 133.71, 201.77 and 128.73

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Solution

The fourth proportional to 133.71, 201.77 and 128.73 is: 194.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.71 : 201.77 = 128.73 : x
  2. Step 2: Convert to fraction form
    133.71/201.77 = 128.73/x
  3. Step 3: Cross multiply
    133.71x = 201.77 × 128.73
  4. Step 4: Simplify right side
    133.71x = 25,974.17
  5. Step 5: Solve for x
    x = 25,974.17/133.71
  6. Step 6: Final answer
    x = 194.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.