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Finding the Fourth Proportional to 68.35, 94.19 and 49.92

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Solution

The fourth proportional to 68.35, 94.19 and 49.92 is: 68.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.35 : 94.19 = 49.92 : x
  2. Step 2: Convert to fraction form
    68.35/94.19 = 49.92/x
  3. Step 3: Cross multiply
    68.35x = 94.19 × 49.92
  4. Step 4: Simplify right side
    68.35x = 4,701.72
  5. Step 5: Solve for x
    x = 4,701.72/68.35
  6. Step 6: Final answer
    x = 68.79

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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.