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Finding the Fourth Proportional to 18,792,140.80, 28,188,211.20 and 18,792,140.80

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Solution

The fourth proportional to 18,792,140.80, 28,188,211.20 and 18,792,140.80 is: 28,188,211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792,140.80 : 28,188,211.20 = 18,792,140.80 : x
  2. Step 2: Convert to fraction form
    18,792,140.80/28,188,211.20 = 18,792,140.80/x
  3. Step 3: Cross multiply
    18,792,140.80x = 28,188,211.20 × 18,792,140.80
  4. Step 4: Simplify right side
    18,792,140.80x = 529,716,833,770,536.94
  5. Step 5: Solve for x
    x = 529,716,833,770,536.94/18,792,140.80
  6. Step 6: Final answer
    x = 28,188,211.20

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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.