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Finding the Fourth Proportional to 115.85, 173.83 and 55

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Solution

The fourth proportional to 115.85, 173.83 and 55 is: 82.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.85 : 173.83 = 55 : x
  2. Step 2: Convert to fraction form
    115.85/173.83 = 55/x
  3. Step 3: Cross multiply
    115.85x = 173.83 × 55
  4. Step 4: Simplify right side
    115.85x = 9,560.65
  5. Step 5: Solve for x
    x = 9,560.65/115.85
  6. Step 6: Final answer
    x = 82.53

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