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Finding the Fourth Proportional to 141.23, 194.46 and 121.41

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Solution

The fourth proportional to 141.23, 194.46 and 121.41 is: 167.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.23 : 194.46 = 121.41 : x
  2. Step 2: Convert to fraction form
    141.23/194.46 = 121.41/x
  3. Step 3: Cross multiply
    141.23x = 194.46 × 121.41
  4. Step 4: Simplify right side
    141.23x = 23,609.39
  5. Step 5: Solve for x
    x = 23,609.39/141.23
  6. Step 6: Final answer
    x = 167.18

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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.