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Finding the Fourth Proportional to 101.85, 141.11 and 92.73

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Solution

The fourth proportional to 101.85, 141.11 and 92.73 is: 128.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.85 : 141.11 = 92.73 : x
  2. Step 2: Convert to fraction form
    101.85/141.11 = 92.73/x
  3. Step 3: Cross multiply
    101.85x = 141.11 × 92.73
  4. Step 4: Simplify right side
    101.85x = 13,085.13
  5. Step 5: Solve for x
    x = 13,085.13/101.85
  6. Step 6: Final answer
    x = 128.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.