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Finding the Fourth Proportional to 73.14, 100.81 and 67.18

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Solution

The fourth proportional to 73.14, 100.81 and 67.18 is: 92.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.14 : 100.81 = 67.18 : x
  2. Step 2: Convert to fraction form
    73.14/100.81 = 67.18/x
  3. Step 3: Cross multiply
    73.14x = 100.81 × 67.18
  4. Step 4: Simplify right side
    73.14x = 6,772.44
  5. Step 5: Solve for x
    x = 6,772.44/73.14
  6. Step 6: Final answer
    x = 92.60

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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.