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Finding the Fourth Proportional to 146.71, 219.76 and 69.56

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Solution

The fourth proportional to 146.71, 219.76 and 69.56 is: 104.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.71 : 219.76 = 69.56 : x
  2. Step 2: Convert to fraction form
    146.71/219.76 = 69.56/x
  3. Step 3: Cross multiply
    146.71x = 219.76 × 69.56
  4. Step 4: Simplify right side
    146.71x = 15,286.45
  5. Step 5: Solve for x
    x = 15,286.45/146.71
  6. Step 6: Final answer
    x = 104.19

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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.