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Finding the Fourth Proportional to 68.20, 101.73 and 66.18

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Solution

The fourth proportional to 68.20, 101.73 and 66.18 is: 98.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.20 : 101.73 = 66.18 : x
  2. Step 2: Convert to fraction form
    68.20/101.73 = 66.18/x
  3. Step 3: Cross multiply
    68.20x = 101.73 × 66.18
  4. Step 4: Simplify right side
    68.20x = 6,732.49
  5. Step 5: Solve for x
    x = 6,732.49/68.20
  6. Step 6: Final answer
    x = 98.72

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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.