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Finding the Third Proportional to 69,921 and 104,880

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Solution

The third proportional to 69,921 and 104,880 is: 157,317.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,921 : 104,880 = 104,880 : x
  2. Step 2: Convert to fraction form
    69,921/104,880 = 104,880/x
  3. Step 3: Cross multiply
    69,921x = 104,880 × 104,880
  4. Step 4: Simplify right side
    69,921x = 10,999,814,400
  5. Step 5: Solve for x
    x = 10,999,814,400/69,921
  6. Step 6: Final answer
    x = 157,317.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.