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Finding the Fourth Proportional to 68.92, 104.24 and 68.52

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Solution

The fourth proportional to 68.92, 104.24 and 68.52 is: 103.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.92 : 104.24 = 68.52 : x
  2. Step 2: Convert to fraction form
    68.92/104.24 = 68.52/x
  3. Step 3: Cross multiply
    68.92x = 104.24 × 68.52
  4. Step 4: Simplify right side
    68.92x = 7,142.52
  5. Step 5: Solve for x
    x = 7,142.52/68.92
  6. Step 6: Final answer
    x = 103.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.