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Finding the Fourth Proportional to 115.47, 173.17 and 54.56

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Solution

The fourth proportional to 115.47, 173.17 and 54.56 is: 81.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.47 : 173.17 = 54.56 : x
  2. Step 2: Convert to fraction form
    115.47/173.17 = 54.56/x
  3. Step 3: Cross multiply
    115.47x = 173.17 × 54.56
  4. Step 4: Simplify right side
    115.47x = 9,448.66
  5. Step 5: Solve for x
    x = 9,448.66/115.47
  6. Step 6: Final answer
    x = 81.83

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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.