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Finding the Fourth Proportional to 73,919.73, 111,013.20 and 68,291.34

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Solution

The fourth proportional to 73,919.73, 111,013.20 and 68,291.34 is: 102,560.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,919.73 : 111,013.20 = 68,291.34 : x
  2. Step 2: Convert to fraction form
    73,919.73/111,013.20 = 68,291.34/x
  3. Step 3: Cross multiply
    73,919.73x = 111,013.20 × 68,291.34
  4. Step 4: Simplify right side
    73,919.73x = 7,581,240,185.69
  5. Step 5: Solve for x
    x = 7,581,240,185.69/73,919.73
  6. Step 6: Final answer
    x = 102,560.44

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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.