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Finding the Third Proportional to 53,991 and 80,424

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Solution

The third proportional to 53,991 and 80,424 is: 119,798.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,991 : 80,424 = 80,424 : x
  2. Step 2: Convert to fraction form
    53,991/80,424 = 80,424/x
  3. Step 3: Cross multiply
    53,991x = 80,424 × 80,424
  4. Step 4: Simplify right side
    53,991x = 6,468,019,776
  5. Step 5: Solve for x
    x = 6,468,019,776/53,991
  6. Step 6: Final answer
    x = 119,798.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.