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Finding the Fourth Proportional to 146.49, 219.76 and 55.18

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Solution

The fourth proportional to 146.49, 219.76 and 55.18 is: 82.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.49 : 219.76 = 55.18 : x
  2. Step 2: Convert to fraction form
    146.49/219.76 = 55.18/x
  3. Step 3: Cross multiply
    146.49x = 219.76 × 55.18
  4. Step 4: Simplify right side
    146.49x = 12,126.36
  5. Step 5: Solve for x
    x = 12,126.36/146.49
  6. Step 6: Final answer
    x = 82.78

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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.