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Finding the Fourth Proportional to 141.27, 195.78 and 139.61

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Solution

The fourth proportional to 141.27, 195.78 and 139.61 is: 193.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.27 : 195.78 = 139.61 : x
  2. Step 2: Convert to fraction form
    141.27/195.78 = 139.61/x
  3. Step 3: Cross multiply
    141.27x = 195.78 × 139.61
  4. Step 4: Simplify right side
    141.27x = 27,331.87
  5. Step 5: Solve for x
    x = 27,331.87/141.27
  6. Step 6: Final answer
    x = 193.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.