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Finding the Fourth Proportional to 108.88, 162.55 and 108.11

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Solution

The fourth proportional to 108.88, 162.55 and 108.11 is: 161.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.88 : 162.55 = 108.11 : x
  2. Step 2: Convert to fraction form
    108.88/162.55 = 108.11/x
  3. Step 3: Cross multiply
    108.88x = 162.55 × 108.11
  4. Step 4: Simplify right side
    108.88x = 17,573.82
  5. Step 5: Solve for x
    x = 17,573.82/108.88
  6. Step 6: Final answer
    x = 161.41

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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.