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Finding the Third Proportional to 80,121 and 130,221.75

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Solution

The third proportional to 80,121 and 130,221.75 is: 211,651.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,121 : 130,221.75 = 130,221.75 : x
  2. Step 2: Convert to fraction form
    80,121/130,221.75 = 130,221.75/x
  3. Step 3: Cross multiply
    80,121x = 130,221.75 × 130,221.75
  4. Step 4: Simplify right side
    80,121x = 16,957,704,173.06
  5. Step 5: Solve for x
    x = 16,957,704,173.06/80,121
  6. Step 6: Final answer
    x = 211,651.18

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.