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Finding the Fourth Proportional to 74,428.40, 111,640.80 and 44,823.80

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Solution

The fourth proportional to 74,428.40, 111,640.80 and 44,823.80 is: 67,234.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,428.40 : 111,640.80 = 44,823.80 : x
  2. Step 2: Convert to fraction form
    74,428.40/111,640.80 = 44,823.80/x
  3. Step 3: Cross multiply
    74,428.40x = 111,640.80 × 44,823.80
  4. Step 4: Simplify right side
    74,428.40x = 5,004,164,891.04
  5. Step 5: Solve for x
    x = 5,004,164,891.04/74,428.40
  6. Step 6: Final answer
    x = 67,234.62

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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.