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Finding the Third Proportional to 87,917,809 and 129,243,079

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Solution

The third proportional to 87,917,809 and 129,243,079 is: 189,993,058.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,917,809 : 129,243,079 = 129,243,079 : x
  2. Step 2: Convert to fraction form
    87,917,809/129,243,079 = 129,243,079/x
  3. Step 3: Cross multiply
    87,917,809x = 129,243,079 × 129,243,079
  4. Step 4: Simplify right side
    87,917,809x = 16,703,773,469,400,240
  5. Step 5: Solve for x
    x = 16,703,773,469,400,240/87,917,809
  6. Step 6: Final answer
    x = 189,993,058.96

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.