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Finding the Fourth Proportional to 141.22, 194.82 and 113.65

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Solution

The fourth proportional to 141.22, 194.82 and 113.65 is: 156.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.22 : 194.82 = 113.65 : x
  2. Step 2: Convert to fraction form
    141.22/194.82 = 113.65/x
  3. Step 3: Cross multiply
    141.22x = 194.82 × 113.65
  4. Step 4: Simplify right side
    141.22x = 22,141.29
  5. Step 5: Solve for x
    x = 22,141.29/141.22
  6. Step 6: Final answer
    x = 156.79

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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.