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Finding the Fourth Proportional to 163.55, 225.72 and 98.12

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Solution

The fourth proportional to 163.55, 225.72 and 98.12 is: 135.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.55 : 225.72 = 98.12 : x
  2. Step 2: Convert to fraction form
    163.55/225.72 = 98.12/x
  3. Step 3: Cross multiply
    163.55x = 225.72 × 98.12
  4. Step 4: Simplify right side
    163.55x = 22,147.65
  5. Step 5: Solve for x
    x = 22,147.65/163.55
  6. Step 6: Final answer
    x = 135.42

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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.