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Finding the Third Proportional to 18,945,430 and 39,871,366

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Solution

The third proportional to 18,945,430 and 39,871,366 is: 83,910,780.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,945,430 : 39,871,366 = 39,871,366 : x
  2. Step 2: Convert to fraction form
    18,945,430/39,871,366 = 39,871,366/x
  3. Step 3: Cross multiply
    18,945,430x = 39,871,366 × 39,871,366
  4. Step 4: Simplify right side
    18,945,430x = 1,589,725,826,705,956
  5. Step 5: Solve for x
    x = 1,589,725,826,705,956/18,945,430
  6. Step 6: Final answer
    x = 83,910,780.95

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.