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Finding the Fourth Proportional to 108.85, 150.17 and 69.49

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Solution

The fourth proportional to 108.85, 150.17 and 69.49 is: 95.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.85 : 150.17 = 69.49 : x
  2. Step 2: Convert to fraction form
    108.85/150.17 = 69.49/x
  3. Step 3: Cross multiply
    108.85x = 150.17 × 69.49
  4. Step 4: Simplify right side
    108.85x = 10,435.31
  5. Step 5: Solve for x
    x = 10,435.31/108.85
  6. Step 6: Final answer
    x = 95.87

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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.