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Finding the Fourth Proportional to 73,224.20, 109,706.70 and 68,558.60

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Solution

The fourth proportional to 73,224.20, 109,706.70 and 68,558.60 is: 102,716.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,224.20 : 109,706.70 = 68,558.60 : x
  2. Step 2: Convert to fraction form
    73,224.20/109,706.70 = 68,558.60/x
  3. Step 3: Cross multiply
    73,224.20x = 109,706.70 × 68,558.60
  4. Step 4: Simplify right side
    73,224.20x = 7,521,337,762.62
  5. Step 5: Solve for x
    x = 7,521,337,762.62/73,224.20
  6. Step 6: Final answer
    x = 102,716.56

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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.