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Finding the Fourth Proportional to 108.86, 163.33 and 84.46

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Solution

The fourth proportional to 108.86, 163.33 and 84.46 is: 126.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.86 : 163.33 = 84.46 : x
  2. Step 2: Convert to fraction form
    108.86/163.33 = 84.46/x
  3. Step 3: Cross multiply
    108.86x = 163.33 × 84.46
  4. Step 4: Simplify right side
    108.86x = 13,794.85
  5. Step 5: Solve for x
    x = 13,794.85/108.86
  6. Step 6: Final answer
    x = 126.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.