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Finding the Fourth Proportional to 108.11, 148.87 and 102.11

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Solution

The fourth proportional to 108.11, 148.87 and 102.11 is: 140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.11 : 148.87 = 102.11 : x
  2. Step 2: Convert to fraction form
    108.11/148.87 = 102.11/x
  3. Step 3: Cross multiply
    108.11x = 148.87 × 102.11
  4. Step 4: Simplify right side
    108.11x = 15,200.50
  5. Step 5: Solve for x
    x = 15,200.50/108.11
  6. Step 6: Final answer
    x = 140.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.