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Finding the Fourth Proportional to 80.94, 122.01 and 79.73

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Solution

The fourth proportional to 80.94, 122.01 and 79.73 is: 120.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.94 : 122.01 = 79.73 : x
  2. Step 2: Convert to fraction form
    80.94/122.01 = 79.73/x
  3. Step 3: Cross multiply
    80.94x = 122.01 × 79.73
  4. Step 4: Simplify right side
    80.94x = 9,727.25
  5. Step 5: Solve for x
    x = 9,727.25/80.94
  6. Step 6: Final answer
    x = 120.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.