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Finding the Fourth Proportional to 141.27, 194.96 and 91.51

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Solution

The fourth proportional to 141.27, 194.96 and 91.51 is: 126.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.27 : 194.96 = 91.51 : x
  2. Step 2: Convert to fraction form
    141.27/194.96 = 91.51/x
  3. Step 3: Cross multiply
    141.27x = 194.96 × 91.51
  4. Step 4: Simplify right side
    141.27x = 17,839.84
  5. Step 5: Solve for x
    x = 17,839.84/141.27
  6. Step 6: Final answer
    x = 126.28

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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.