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Finding the Fourth Proportional to 108.41, 162.34 and 67.70

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Solution

The fourth proportional to 108.41, 162.34 and 67.70 is: 101.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.41 : 162.34 = 67.70 : x
  2. Step 2: Convert to fraction form
    108.41/162.34 = 67.70/x
  3. Step 3: Cross multiply
    108.41x = 162.34 × 67.70
  4. Step 4: Simplify right side
    108.41x = 10,990.65
  5. Step 5: Solve for x
    x = 10,990.65/108.41
  6. Step 6: Final answer
    x = 101.39

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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.