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Finding the Third Proportional to 90,879 and 130,086

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Solution

The third proportional to 90,879 and 130,086 is: 186,207.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,879 : 130,086 = 130,086 : x
  2. Step 2: Convert to fraction form
    90,879/130,086 = 130,086/x
  3. Step 3: Cross multiply
    90,879x = 130,086 × 130,086
  4. Step 4: Simplify right side
    90,879x = 16,922,367,396
  5. Step 5: Solve for x
    x = 16,922,367,396/90,879
  6. Step 6: Final answer
    x = 186,207.68

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.