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Finding the Third Proportional to 18,120.75 and 39,344.25

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Solution

The third proportional to 18,120.75 and 39,344.25 is: 85,425.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.75 : 39,344.25 = 39,344.25 : x
  2. Step 2: Convert to fraction form
    18,120.75/39,344.25 = 39,344.25/x
  3. Step 3: Cross multiply
    18,120.75x = 39,344.25 × 39,344.25
  4. Step 4: Simplify right side
    18,120.75x = 1,547,970,008.06
  5. Step 5: Solve for x
    x = 1,547,970,008.06/18,120.75
  6. Step 6: Final answer
    x = 85,425.27

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.