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Finding the Fourth Proportional to 7,261,126.80, 10,891,690.20 and 7,261,126.80

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Solution

The fourth proportional to 7,261,126.80, 10,891,690.20 and 7,261,126.80 is: 10,891,690.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,261,126.80 : 10,891,690.20 = 7,261,126.80 : x
  2. Step 2: Convert to fraction form
    7,261,126.80/10,891,690.20 = 7,261,126.80/x
  3. Step 3: Cross multiply
    7,261,126.80x = 10,891,690.20 × 7,261,126.80
  4. Step 4: Simplify right side
    7,261,126.80x = 79,085,943,608,517.36
  5. Step 5: Solve for x
    x = 79,085,943,608,517.36/7,261,126.80
  6. Step 6: Final answer
    x = 10,891,690.20

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Double scale
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1.5x scale

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.