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Finding the Fourth Proportional to 141.35, 194.91 and 108.68

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Solution

The fourth proportional to 141.35, 194.91 and 108.68 is: 149.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.35 : 194.91 = 108.68 : x
  2. Step 2: Convert to fraction form
    141.35/194.91 = 108.68/x
  3. Step 3: Cross multiply
    141.35x = 194.91 × 108.68
  4. Step 4: Simplify right side
    141.35x = 21,182.82
  5. Step 5: Solve for x
    x = 21,182.82/141.35
  6. Step 6: Final answer
    x = 149.86

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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.