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Finding the Fourth Proportional to 80.39, 120.73 and 59.83

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Solution

The fourth proportional to 80.39, 120.73 and 59.83 is: 89.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.39 : 120.73 = 59.83 : x
  2. Step 2: Convert to fraction form
    80.39/120.73 = 59.83/x
  3. Step 3: Cross multiply
    80.39x = 120.73 × 59.83
  4. Step 4: Simplify right side
    80.39x = 7,222.97
  5. Step 5: Solve for x
    x = 7,222.97/80.39
  6. Step 6: Final answer
    x = 89.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.