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Finding the Fourth Proportional to 163.18, 225.37 and 126.78

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Solution

The fourth proportional to 163.18, 225.37 and 126.78 is: 175.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.18 : 225.37 = 126.78 : x
  2. Step 2: Convert to fraction form
    163.18/225.37 = 126.78/x
  3. Step 3: Cross multiply
    163.18x = 225.37 × 126.78
  4. Step 4: Simplify right side
    163.18x = 28,571.28
  5. Step 5: Solve for x
    x = 28,571.28/163.18
  6. Step 6: Final answer
    x = 175.09

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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.