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Finding the Fourth Proportional to 163.56, 225.36 and 126.65

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Solution

The fourth proportional to 163.56, 225.36 and 126.65 is: 174.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.56 : 225.36 = 126.65 : x
  2. Step 2: Convert to fraction form
    163.56/225.36 = 126.65/x
  3. Step 3: Cross multiply
    163.56x = 225.36 × 126.65
  4. Step 4: Simplify right side
    163.56x = 28,540.72
  5. Step 5: Solve for x
    x = 28,540.72/163.56
  6. Step 6: Final answer
    x = 174.50

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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.