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Finding the Fourth Proportional to 69.46, 104.65 and 68.62

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Solution

The fourth proportional to 69.46, 104.65 and 68.62 is: 103.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.46 : 104.65 = 68.62 : x
  2. Step 2: Convert to fraction form
    69.46/104.65 = 68.62/x
  3. Step 3: Cross multiply
    69.46x = 104.65 × 68.62
  4. Step 4: Simplify right side
    69.46x = 7,181.08
  5. Step 5: Solve for x
    x = 7,181.08/69.46
  6. Step 6: Final answer
    x = 103.38

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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.