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Finding the Fourth Proportional to 163.26, 225.28 and 97.78

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Solution

The fourth proportional to 163.26, 225.28 and 97.78 is: 134.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.26 : 225.28 = 97.78 : x
  2. Step 2: Convert to fraction form
    163.26/225.28 = 97.78/x
  3. Step 3: Cross multiply
    163.26x = 225.28 × 97.78
  4. Step 4: Simplify right side
    163.26x = 22,027.88
  5. Step 5: Solve for x
    x = 22,027.88/163.26
  6. Step 6: Final answer
    x = 134.93

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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.