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Finding the Fourth Proportional to 135.38, 203.07 and 49.88

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Solution

The fourth proportional to 135.38, 203.07 and 49.88 is: 74.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.38 : 203.07 = 49.88 : x
  2. Step 2: Convert to fraction form
    135.38/203.07 = 49.88/x
  3. Step 3: Cross multiply
    135.38x = 203.07 × 49.88
  4. Step 4: Simplify right side
    135.38x = 10,128.12
  5. Step 5: Solve for x
    x = 10,128.12/135.38
  6. Step 6: Final answer
    x = 74.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.