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Finding the Fourth Proportional to 92.73, 138.44 and 84.23

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Solution

The fourth proportional to 92.73, 138.44 and 84.23 is: 125.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.73 : 138.44 = 84.23 : x
  2. Step 2: Convert to fraction form
    92.73/138.44 = 84.23/x
  3. Step 3: Cross multiply
    92.73x = 138.44 × 84.23
  4. Step 4: Simplify right side
    92.73x = 11,660.80
  5. Step 5: Solve for x
    x = 11,660.80/92.73
  6. Step 6: Final answer
    x = 125.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.