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Finding the Third Proportional to 4,996,690,638 and 7,761,891,978

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Solution

The third proportional to 4,996,690,638 and 7,761,891,978 is: 12,057,373,858.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,996,690,638 : 7,761,891,978 = 7,761,891,978 : x
  2. Step 2: Convert to fraction form
    4,996,690,638/7,761,891,978 = 7,761,891,978/x
  3. Step 3: Cross multiply
    4,996,690,638x = 7,761,891,978 × 7,761,891,978
  4. Step 4: Simplify right side
    4,996,690,638x = 60,246,967,078,140,755,968
  5. Step 5: Solve for x
    x = 60,246,967,078,140,755,968/4,996,690,638
  6. Step 6: Final answer
    x = 12,057,373,858.60

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.