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Finding the Fourth Proportional to 213,181,228.80, 319,771,843.20 and 213,181,228.80

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Solution

The fourth proportional to 213,181,228.80, 319,771,843.20 and 213,181,228.80 is: 319,771,843.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,181,228.80 : 319,771,843.20 = 213,181,228.80 : x
  2. Step 2: Convert to fraction form
    213,181,228.80/319,771,843.20 = 213,181,228.80/x
  3. Step 3: Cross multiply
    213,181,228.80x = 319,771,843.20 × 213,181,228.80
  4. Step 4: Simplify right side
    213,181,228.80x = 68,169,354,469,016,928
  5. Step 5: Solve for x
    x = 68,169,354,469,016,928/213,181,228.80
  6. Step 6: Final answer
    x = 319,771,843.20

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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.