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Finding the Fourth Proportional to 73.73, 110.72 and 61.70

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Solution

The fourth proportional to 73.73, 110.72 and 61.70 is: 92.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.73 : 110.72 = 61.70 : x
  2. Step 2: Convert to fraction form
    73.73/110.72 = 61.70/x
  3. Step 3: Cross multiply
    73.73x = 110.72 × 61.70
  4. Step 4: Simplify right side
    73.73x = 6,830.56
  5. Step 5: Solve for x
    x = 6,830.56/73.73
  6. Step 6: Final answer
    x = 92.65

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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.