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Finding the Third Proportional to 43,778 and 65,991

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Solution

The third proportional to 43,778 and 65,991 is: 99,474.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,778 : 65,991 = 65,991 : x
  2. Step 2: Convert to fraction form
    43,778/65,991 = 65,991/x
  3. Step 3: Cross multiply
    43,778x = 65,991 × 65,991
  4. Step 4: Simplify right side
    43,778x = 4,354,812,081
  5. Step 5: Solve for x
    x = 4,354,812,081/43,778
  6. Step 6: Final answer
    x = 99,474.90

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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.