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Finding the Third Proportional to 69,879 and 98,783

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Solution

The third proportional to 69,879 and 98,783 is: 139,642.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,879 : 98,783 = 98,783 : x
  2. Step 2: Convert to fraction form
    69,879/98,783 = 98,783/x
  3. Step 3: Cross multiply
    69,879x = 98,783 × 98,783
  4. Step 4: Simplify right side
    69,879x = 9,758,081,089
  5. Step 5: Solve for x
    x = 9,758,081,089/69,879
  6. Step 6: Final answer
    x = 139,642.54

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.