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Finding the Third Proportional to 37,420 and 81,878

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Solution

The third proportional to 37,420 and 81,878 is: 179,155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,420 : 81,878 = 81,878 : x
  2. Step 2: Convert to fraction form
    37,420/81,878 = 81,878/x
  3. Step 3: Cross multiply
    37,420x = 81,878 × 81,878
  4. Step 4: Simplify right side
    37,420x = 6,704,006,884
  5. Step 5: Solve for x
    x = 6,704,006,884/37,420
  6. Step 6: Final answer
    x = 179,155.72

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.