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Finding the Fourth Proportional to 7,815,661,678.80, 10,970,950,114.80 and 7,815,661,678.80

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Solution

The fourth proportional to 7,815,661,678.80, 10,970,950,114.80 and 7,815,661,678.80 is: 10,970,950,114.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815,661,678.80 : 10,970,950,114.80 = 7,815,661,678.80 : x
  2. Step 2: Convert to fraction form
    7,815,661,678.80/10,970,950,114.80 = 7,815,661,678.80/x
  3. Step 3: Cross multiply
    7,815,661,678.80x = 10,970,950,114.80 × 7,815,661,678.80
  4. Step 4: Simplify right side
    7,815,661,678.80x = 85,745,234,392,268,816,384
  5. Step 5: Solve for x
    x = 85,745,234,392,268,816,384/7,815,661,678.80
  6. Step 6: Final answer
    x = 10,970,950,114.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.