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Finding the Fourth Proportional to 140.97, 194.45 and 89.13

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Solution

The fourth proportional to 140.97, 194.45 and 89.13 is: 122.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.97 : 194.45 = 89.13 : x
  2. Step 2: Convert to fraction form
    140.97/194.45 = 89.13/x
  3. Step 3: Cross multiply
    140.97x = 194.45 × 89.13
  4. Step 4: Simplify right side
    140.97x = 17,331.33
  5. Step 5: Solve for x
    x = 17,331.33/140.97
  6. Step 6: Final answer
    x = 122.94

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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.