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Finding the Third Proportional to 87,917,808 and 129,243,078

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Solution

The third proportional to 87,917,808 and 129,243,078 is: 189,993,058.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,917,808 : 129,243,078 = 129,243,078 : x
  2. Step 2: Convert to fraction form
    87,917,808/129,243,078 = 129,243,078/x
  3. Step 3: Cross multiply
    87,917,808x = 129,243,078 × 129,243,078
  4. Step 4: Simplify right side
    87,917,808x = 16,703,773,210,914,084
  5. Step 5: Solve for x
    x = 16,703,773,210,914,084/87,917,808
  6. Step 6: Final answer
    x = 189,993,058.19

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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.