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Finding the Fourth Proportional to 148.96, 206.61 and 143.49

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Solution

The fourth proportional to 148.96, 206.61 and 143.49 is: 199.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.96 : 206.61 = 143.49 : x
  2. Step 2: Convert to fraction form
    148.96/206.61 = 143.49/x
  3. Step 3: Cross multiply
    148.96x = 206.61 × 143.49
  4. Step 4: Simplify right side
    148.96x = 29,646.47
  5. Step 5: Solve for x
    x = 29,646.47/148.96
  6. Step 6: Final answer
    x = 199.02

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.