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Finding the Fourth Proportional to 68.09, 93.92 and 38.97

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Solution

The fourth proportional to 68.09, 93.92 and 38.97 is: 53.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.09 : 93.92 = 38.97 : x
  2. Step 2: Convert to fraction form
    68.09/93.92 = 38.97/x
  3. Step 3: Cross multiply
    68.09x = 93.92 × 38.97
  4. Step 4: Simplify right side
    68.09x = 3,659.87
  5. Step 5: Solve for x
    x = 3,659.87/68.09
  6. Step 6: Final answer
    x = 53.75

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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.