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Finding the Third Proportional to 43,921 and 66,267.50

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Solution

The third proportional to 43,921 and 66,267.50 is: 99,983.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,921 : 66,267.50 = 66,267.50 : x
  2. Step 2: Convert to fraction form
    43,921/66,267.50 = 66,267.50/x
  3. Step 3: Cross multiply
    43,921x = 66,267.50 × 66,267.50
  4. Step 4: Simplify right side
    43,921x = 4,391,381,556.25
  5. Step 5: Solve for x
    x = 4,391,381,556.25/43,921
  6. Step 6: Final answer
    x = 99,983.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.