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Finding the Fourth Proportional to 135.45, 204.21 and 133.92

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Solution

The fourth proportional to 135.45, 204.21 and 133.92 is: 201.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.45 : 204.21 = 133.92 : x
  2. Step 2: Convert to fraction form
    135.45/204.21 = 133.92/x
  3. Step 3: Cross multiply
    135.45x = 204.21 × 133.92
  4. Step 4: Simplify right side
    135.45x = 27,347.80
  5. Step 5: Solve for x
    x = 27,347.80/135.45
  6. Step 6: Final answer
    x = 201.90

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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.