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Finding the Fourth Proportional to 108.11, 162.05 and 35.91

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Solution

The fourth proportional to 108.11, 162.05 and 35.91 is: 53.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.11 : 162.05 = 35.91 : x
  2. Step 2: Convert to fraction form
    108.11/162.05 = 35.91/x
  3. Step 3: Cross multiply
    108.11x = 162.05 × 35.91
  4. Step 4: Simplify right side
    108.11x = 5,819.04
  5. Step 5: Solve for x
    x = 5,819.04/108.11
  6. Step 6: Final answer
    x = 53.83

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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.