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Finding the Fourth Proportional to 28,728,138.60, 43,092,207.90 and 28,728,138.60

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Solution

The fourth proportional to 28,728,138.60, 43,092,207.90 and 28,728,138.60 is: 43,092,207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,728,138.60 : 43,092,207.90 = 28,728,138.60 : x
  2. Step 2: Convert to fraction form
    28,728,138.60/43,092,207.90 = 28,728,138.60/x
  3. Step 3: Cross multiply
    28,728,138.60x = 43,092,207.90 × 28,728,138.60
  4. Step 4: Simplify right side
    28,728,138.60x = 1,237,958,921,131,215
  5. Step 5: Solve for x
    x = 1,237,958,921,131,215/28,728,138.60
  6. Step 6: Final answer
    x = 43,092,207.90

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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.