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Finding the Fourth Proportional to 108.06, 149.19 and 66.66

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Solution

The fourth proportional to 108.06, 149.19 and 66.66 is: 92.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.06 : 149.19 = 66.66 : x
  2. Step 2: Convert to fraction form
    108.06/149.19 = 66.66/x
  3. Step 3: Cross multiply
    108.06x = 149.19 × 66.66
  4. Step 4: Simplify right side
    108.06x = 9,945.20
  5. Step 5: Solve for x
    x = 9,945.20/108.06
  6. Step 6: Final answer
    x = 92.03

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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.