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Finding the Fourth Proportional to 163.71, 243.50 and 149.10

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Solution

The fourth proportional to 163.71, 243.50 and 149.10 is: 221.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.71 : 243.50 = 149.10 : x
  2. Step 2: Convert to fraction form
    163.71/243.50 = 149.10/x
  3. Step 3: Cross multiply
    163.71x = 243.50 × 149.10
  4. Step 4: Simplify right side
    163.71x = 36,305.03
  5. Step 5: Solve for x
    x = 36,305.03/163.71
  6. Step 6: Final answer
    x = 221.76

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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.