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Finding the Third Proportional to 18,285,069 and 39,321,978

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Solution

The third proportional to 18,285,069 and 39,321,978 is: 84,561,778.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285,069 : 39,321,978 = 39,321,978 : x
  2. Step 2: Convert to fraction form
    18,285,069/39,321,978 = 39,321,978/x
  3. Step 3: Cross multiply
    18,285,069x = 39,321,978 × 39,321,978
  4. Step 4: Simplify right side
    18,285,069x = 1,546,217,953,832,484
  5. Step 5: Solve for x
    x = 1,546,217,953,832,484/18,285,069
  6. Step 6: Final answer
    x = 84,561,778.46

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.