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Finding the Third Proportional to 9,996,868,856 and 20,821,172,661

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Solution

The third proportional to 9,996,868,856 and 20,821,172,661 is: 43,365,701,523.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,996,868,856 : 20,821,172,661 = 20,821,172,661 : x
  2. Step 2: Convert to fraction form
    9,996,868,856/20,821,172,661 = 20,821,172,661/x
  3. Step 3: Cross multiply
    9,996,868,856x = 20,821,172,661 × 20,821,172,661
  4. Step 4: Simplify right side
    9,996,868,856x = 433,521,230,979,173,842,944
  5. Step 5: Solve for x
    x = 433,521,230,979,173,842,944/9,996,868,856
  6. Step 6: Final answer
    x = 43,365,701,523.53

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.