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Finding the Third Proportional to 149,205,957 and 321,086,739

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Solution

The third proportional to 149,205,957 and 321,086,739 is: 690,969,020.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,205,957 : 321,086,739 = 321,086,739 : x
  2. Step 2: Convert to fraction form
    149,205,957/321,086,739 = 321,086,739/x
  3. Step 3: Cross multiply
    149,205,957x = 321,086,739 × 321,086,739
  4. Step 4: Simplify right side
    149,205,957x = 103,096,693,961,654,128
  5. Step 5: Solve for x
    x = 103,096,693,961,654,128/149,205,957
  6. Step 6: Final answer
    x = 690,969,020.50

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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.