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Finding the Fourth Proportional to 73.86, 110.96 and 54.72

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Solution

The fourth proportional to 73.86, 110.96 and 54.72 is: 82.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.86 : 110.96 = 54.72 : x
  2. Step 2: Convert to fraction form
    73.86/110.96 = 54.72/x
  3. Step 3: Cross multiply
    73.86x = 110.96 × 54.72
  4. Step 4: Simplify right side
    73.86x = 6,071.73
  5. Step 5: Solve for x
    x = 6,071.73/73.86
  6. Step 6: Final answer
    x = 82.21

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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.