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Finding the Fourth Proportional to 163.25, 225.28 and 89.56

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Solution

The fourth proportional to 163.25, 225.28 and 89.56 is: 123.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.25 : 225.28 = 89.56 : x
  2. Step 2: Convert to fraction form
    163.25/225.28 = 89.56/x
  3. Step 3: Cross multiply
    163.25x = 225.28 × 89.56
  4. Step 4: Simplify right side
    163.25x = 20,175.85
  5. Step 5: Solve for x
    x = 20,175.85/163.25
  6. Step 6: Final answer
    x = 123.59

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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.