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Finding the Fourth Proportional to 115.95, 173.86 and 55.09

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Solution

The fourth proportional to 115.95, 173.86 and 55.09 is: 82.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.95 : 173.86 = 55.09 : x
  2. Step 2: Convert to fraction form
    115.95/173.86 = 55.09/x
  3. Step 3: Cross multiply
    115.95x = 173.86 × 55.09
  4. Step 4: Simplify right side
    115.95x = 9,577.67
  5. Step 5: Solve for x
    x = 9,577.67/115.95
  6. Step 6: Final answer
    x = 82.61

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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.