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Finding the Third Proportional to 43,880 and 69,288

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Solution

The third proportional to 43,880 and 69,288 is: 109,408.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,880 : 69,288 = 69,288 : x
  2. Step 2: Convert to fraction form
    43,880/69,288 = 69,288/x
  3. Step 3: Cross multiply
    43,880x = 69,288 × 69,288
  4. Step 4: Simplify right side
    43,880x = 4,800,826,944
  5. Step 5: Solve for x
    x = 4,800,826,944/43,880
  6. Step 6: Final answer
    x = 109,408.09

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.