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Finding the Fourth Proportional to 163.54, 225.45 and 124.66

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Solution

The fourth proportional to 163.54, 225.45 and 124.66 is: 171.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.54 : 225.45 = 124.66 : x
  2. Step 2: Convert to fraction form
    163.54/225.45 = 124.66/x
  3. Step 3: Cross multiply
    163.54x = 225.45 × 124.66
  4. Step 4: Simplify right side
    163.54x = 28,104.60
  5. Step 5: Solve for x
    x = 28,104.60/163.54
  6. Step 6: Final answer
    x = 171.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.