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Finding the Fourth Proportional to 163.88, 226.12 and 98.36

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Solution

The fourth proportional to 163.88, 226.12 and 98.36 is: 135.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.88 : 226.12 = 98.36 : x
  2. Step 2: Convert to fraction form
    163.88/226.12 = 98.36/x
  3. Step 3: Cross multiply
    163.88x = 226.12 × 98.36
  4. Step 4: Simplify right side
    163.88x = 22,241.16
  5. Step 5: Solve for x
    x = 22,241.16/163.88
  6. Step 6: Final answer
    x = 135.72

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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.