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Finding the Fourth Proportional to 163.54, 243.44 and 161.11

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Solution

The fourth proportional to 163.54, 243.44 and 161.11 is: 239.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.54 : 243.44 = 161.11 : x
  2. Step 2: Convert to fraction form
    163.54/243.44 = 161.11/x
  3. Step 3: Cross multiply
    163.54x = 243.44 × 161.11
  4. Step 4: Simplify right side
    163.54x = 39,220.62
  5. Step 5: Solve for x
    x = 39,220.62/163.54
  6. Step 6: Final answer
    x = 239.82

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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.