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Finding the Third Proportional to 31,038 and 66,997.50

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Solution

The third proportional to 31,038 and 66,997.50 is: 144,618.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,038 : 66,997.50 = 66,997.50 : x
  2. Step 2: Convert to fraction form
    31,038/66,997.50 = 66,997.50/x
  3. Step 3: Cross multiply
    31,038x = 66,997.50 × 66,997.50
  4. Step 4: Simplify right side
    31,038x = 4,488,665,006.25
  5. Step 5: Solve for x
    x = 4,488,665,006.25/31,038
  6. Step 6: Final answer
    x = 144,618.37

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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.