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Finding the Fourth Proportional to 108.17, 161.51 and 88.95

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Solution

The fourth proportional to 108.17, 161.51 and 88.95 is: 132.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.17 : 161.51 = 88.95 : x
  2. Step 2: Convert to fraction form
    108.17/161.51 = 88.95/x
  3. Step 3: Cross multiply
    108.17x = 161.51 × 88.95
  4. Step 4: Simplify right side
    108.17x = 14,365.73
  5. Step 5: Solve for x
    x = 14,365.73/108.17
  6. Step 6: Final answer
    x = 132.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.