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Finding the Fourth Proportional to 49.38, 68.09 and 36.42

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Solution

The fourth proportional to 49.38, 68.09 and 36.42 is: 50.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.38 : 68.09 = 36.42 : x
  2. Step 2: Convert to fraction form
    49.38/68.09 = 36.42/x
  3. Step 3: Cross multiply
    49.38x = 68.09 × 36.42
  4. Step 4: Simplify right side
    49.38x = 2,479.66
  5. Step 5: Solve for x
    x = 2,479.66/49.38
  6. Step 6: Final answer
    x = 50.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.