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Finding the Fourth Proportional to 28,990,356.80, 43,373,560.80 and 18,912,660.80

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Solution

The fourth proportional to 28,990,356.80, 43,373,560.80 and 18,912,660.80 is: 28,295,941.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990,356.80 : 43,373,560.80 = 18,912,660.80 : x
  2. Step 2: Convert to fraction form
    28,990,356.80/43,373,560.80 = 18,912,660.80/x
  3. Step 3: Cross multiply
    28,990,356.80x = 43,373,560.80 × 18,912,660.80
  4. Step 4: Simplify right side
    28,990,356.80x = 820,309,443,098,576.62
  5. Step 5: Solve for x
    x = 820,309,443,098,576.62/28,990,356.80
  6. Step 6: Final answer
    x = 28,295,941.60

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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.