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Finding the Fourth Proportional to 70.62, 104.97 and 69.18

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Solution

The fourth proportional to 70.62, 104.97 and 69.18 is: 102.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.62 : 104.97 = 69.18 : x
  2. Step 2: Convert to fraction form
    70.62/104.97 = 69.18/x
  3. Step 3: Cross multiply
    70.62x = 104.97 × 69.18
  4. Step 4: Simplify right side
    70.62x = 7,261.82
  5. Step 5: Solve for x
    x = 7,261.82/70.62
  6. Step 6: Final answer
    x = 102.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.