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Finding the Fourth Proportional to 108.96, 164.63 and 108

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Solution

The fourth proportional to 108.96, 164.63 and 108 is: 163.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.96 : 164.63 = 108 : x
  2. Step 2: Convert to fraction form
    108.96/164.63 = 108/x
  3. Step 3: Cross multiply
    108.96x = 164.63 × 108
  4. Step 4: Simplify right side
    108.96x = 17,780.04
  5. Step 5: Solve for x
    x = 17,780.04/108.96
  6. Step 6: Final answer
    x = 163.18

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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.