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Finding the Fourth Proportional to 73.73, 110.58 and 20.95

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Solution

The fourth proportional to 73.73, 110.58 and 20.95 is: 31.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.73 : 110.58 = 20.95 : x
  2. Step 2: Convert to fraction form
    73.73/110.58 = 20.95/x
  3. Step 3: Cross multiply
    73.73x = 110.58 × 20.95
  4. Step 4: Simplify right side
    73.73x = 2,316.10
  5. Step 5: Solve for x
    x = 2,316.10/73.73
  6. Step 6: Final answer
    x = 31.41

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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.