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Finding the Fourth Proportional to 148.18, 220.99 and 137.38

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Solution

The fourth proportional to 148.18, 220.99 and 137.38 is: 204.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.18 : 220.99 = 137.38 : x
  2. Step 2: Convert to fraction form
    148.18/220.99 = 137.38/x
  3. Step 3: Cross multiply
    148.18x = 220.99 × 137.38
  4. Step 4: Simplify right side
    148.18x = 30,359.61
  5. Step 5: Solve for x
    x = 30,359.61/148.18
  6. Step 6: Final answer
    x = 204.88

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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.