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Finding the Fourth Proportional to 115.80, 173.64 and 54.96

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Solution

The fourth proportional to 115.80, 173.64 and 54.96 is: 82.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.80 : 173.64 = 54.96 : x
  2. Step 2: Convert to fraction form
    115.80/173.64 = 54.96/x
  3. Step 3: Cross multiply
    115.80x = 173.64 × 54.96
  4. Step 4: Simplify right side
    115.80x = 9,543.25
  5. Step 5: Solve for x
    x = 9,543.25/115.80
  6. Step 6: Final answer
    x = 82.41

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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.