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Finding the Fourth Proportional to 91.97, 137.96 and 34.19

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Solution

The fourth proportional to 91.97, 137.96 and 34.19 is: 51.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.97 : 137.96 = 34.19 : x
  2. Step 2: Convert to fraction form
    91.97/137.96 = 34.19/x
  3. Step 3: Cross multiply
    91.97x = 137.96 × 34.19
  4. Step 4: Simplify right side
    91.97x = 4,716.25
  5. Step 5: Solve for x
    x = 4,716.25/91.97
  6. Step 6: Final answer
    x = 51.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.