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Finding the Third Proportional to 30,975 and 66,918

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Solution

The third proportional to 30,975 and 66,918 is: 144,568.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,975 : 66,918 = 66,918 : x
  2. Step 2: Convert to fraction form
    30,975/66,918 = 66,918/x
  3. Step 3: Cross multiply
    30,975x = 66,918 × 66,918
  4. Step 4: Simplify right side
    30,975x = 4,478,018,724
  5. Step 5: Solve for x
    x = 4,478,018,724/30,975
  6. Step 6: Final answer
    x = 144,568.80

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.