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Finding the Fourth Proportional to 146.62, 219.90 and 69.55

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Solution

The fourth proportional to 146.62, 219.90 and 69.55 is: 104.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.62 : 219.90 = 69.55 : x
  2. Step 2: Convert to fraction form
    146.62/219.90 = 69.55/x
  3. Step 3: Cross multiply
    146.62x = 219.90 × 69.55
  4. Step 4: Simplify right side
    146.62x = 15,294.05
  5. Step 5: Solve for x
    x = 15,294.05/146.62
  6. Step 6: Final answer
    x = 104.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.