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Finding the Fourth Proportional to 108.80, 163.21 and 27.64

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Solution

The fourth proportional to 108.80, 163.21 and 27.64 is: 41.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.80 : 163.21 = 27.64 : x
  2. Step 2: Convert to fraction form
    108.80/163.21 = 27.64/x
  3. Step 3: Cross multiply
    108.80x = 163.21 × 27.64
  4. Step 4: Simplify right side
    108.80x = 4,511.63
  5. Step 5: Solve for x
    x = 4,511.63/108.80
  6. Step 6: Final answer
    x = 41.47

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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.