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Finding the Fourth Proportional to 73,920.70, 110,881.05 and 21,331.90

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Solution

The fourth proportional to 73,920.70, 110,881.05 and 21,331.90 is: 31,997.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,920.70 : 110,881.05 = 21,331.90 : x
  2. Step 2: Convert to fraction form
    73,920.70/110,881.05 = 21,331.90/x
  3. Step 3: Cross multiply
    73,920.70x = 110,881.05 × 21,331.90
  4. Step 4: Simplify right side
    73,920.70x = 2,365,303,470.50
  5. Step 5: Solve for x
    x = 2,365,303,470.50/73,920.70
  6. Step 6: Final answer
    x = 31,997.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.