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Finding the Fourth Proportional to 108.71, 163.22 and 97.98

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Solution

The fourth proportional to 108.71, 163.22 and 97.98 is: 147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.71 : 163.22 = 97.98 : x
  2. Step 2: Convert to fraction form
    108.71/163.22 = 97.98/x
  3. Step 3: Cross multiply
    108.71x = 163.22 × 97.98
  4. Step 4: Simplify right side
    108.71x = 15,991.19
  5. Step 5: Solve for x
    x = 15,991.19/108.71
  6. Step 6: Final answer
    x = 147.10

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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.