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Finding the Fourth Proportional to 141.20, 194.80 and 92.08

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Solution

The fourth proportional to 141.20, 194.80 and 92.08 is: 127.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.20 : 194.80 = 92.08 : x
  2. Step 2: Convert to fraction form
    141.20/194.80 = 92.08/x
  3. Step 3: Cross multiply
    141.20x = 194.80 × 92.08
  4. Step 4: Simplify right side
    141.20x = 17,937.18
  5. Step 5: Solve for x
    x = 17,937.18/141.20
  6. Step 6: Final answer
    x = 127.03

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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.