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Finding the Fourth Proportional to 108.85, 163.29 and 36.71

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Solution

The fourth proportional to 108.85, 163.29 and 36.71 is: 55.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.85 : 163.29 = 36.71 : x
  2. Step 2: Convert to fraction form
    108.85/163.29 = 36.71/x
  3. Step 3: Cross multiply
    108.85x = 163.29 × 36.71
  4. Step 4: Simplify right side
    108.85x = 5,993.56
  5. Step 5: Solve for x
    x = 5,993.56/108.85
  6. Step 6: Final answer
    x = 55.07

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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.