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Finding the Fourth Proportional to 73,120.44, 109,724.34 and 67,171.80

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Solution

The fourth proportional to 73,120.44, 109,724.34 and 67,171.80 is: 100,797.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,120.44 : 109,724.34 = 67,171.80 : x
  2. Step 2: Convert to fraction form
    73,120.44/109,724.34 = 67,171.80/x
  3. Step 3: Cross multiply
    73,120.44x = 109,724.34 × 67,171.80
  4. Step 4: Simplify right side
    73,120.44x = 7,370,381,421.61
  5. Step 5: Solve for x
    x = 7,370,381,421.61/73,120.44
  6. Step 6: Final answer
    x = 100,797.83

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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.