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Finding the Third Proportional to 18,108.75 and 39,429.75

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Solution

The third proportional to 18,108.75 and 39,429.75 is: 85,853.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,108.75 : 39,429.75 = 39,429.75 : x
  2. Step 2: Convert to fraction form
    18,108.75/39,429.75 = 39,429.75/x
  3. Step 3: Cross multiply
    18,108.75x = 39,429.75 × 39,429.75
  4. Step 4: Simplify right side
    18,108.75x = 1,554,705,185.06
  5. Step 5: Solve for x
    x = 1,554,705,185.06/18,108.75
  6. Step 6: Final answer
    x = 85,853.81

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.