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Finding the Fourth Proportional to 108.36, 163.11 and 93.47

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Solution

The fourth proportional to 108.36, 163.11 and 93.47 is: 140.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.36 : 163.11 = 93.47 : x
  2. Step 2: Convert to fraction form
    108.36/163.11 = 93.47/x
  3. Step 3: Cross multiply
    108.36x = 163.11 × 93.47
  4. Step 4: Simplify right side
    108.36x = 15,245.89
  5. Step 5: Solve for x
    x = 15,245.89/108.36
  6. Step 6: Final answer
    x = 140.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.