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Finding the Fourth Proportional to 108.49, 162.67 and 69.93

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Solution

The fourth proportional to 108.49, 162.67 and 69.93 is: 104.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.49 : 162.67 = 69.93 : x
  2. Step 2: Convert to fraction form
    108.49/162.67 = 69.93/x
  3. Step 3: Cross multiply
    108.49x = 162.67 × 69.93
  4. Step 4: Simplify right side
    108.49x = 11,375.27
  5. Step 5: Solve for x
    x = 11,375.27/108.49
  6. Step 6: Final answer
    x = 104.85

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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.