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Finding the Fourth Proportional to 7,381,491.20, 11,072,236.80 and 7,381,491.20

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Solution

The fourth proportional to 7,381,491.20, 11,072,236.80 and 7,381,491.20 is: 11,072,236.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,381,491.20 : 11,072,236.80 = 7,381,491.20 : x
  2. Step 2: Convert to fraction form
    7,381,491.20/11,072,236.80 = 7,381,491.20/x
  3. Step 3: Cross multiply
    7,381,491.20x = 11,072,236.80 × 7,381,491.20
  4. Step 4: Simplify right side
    7,381,491.20x = 81,729,618,503,516.17
  5. Step 5: Solve for x
    x = 81,729,618,503,516.17/7,381,491.20
  6. Step 6: Final answer
    x = 11,072,236.80

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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.