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Finding the Third Proportional to 43,710 and 77,718

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Solution

The third proportional to 43,710 and 77,718 is: 138,185.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,710 : 77,718 = 77,718 : x
  2. Step 2: Convert to fraction form
    43,710/77,718 = 77,718/x
  3. Step 3: Cross multiply
    43,710x = 77,718 × 77,718
  4. Step 4: Simplify right side
    43,710x = 6,040,087,524
  5. Step 5: Solve for x
    x = 6,040,087,524/43,710
  6. Step 6: Final answer
    x = 138,185.48

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.