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Finding the Third Proportional to 50,372 and 78,620

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Solution

The third proportional to 50,372 and 78,620 is: 122,709.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,372 : 78,620 = 78,620 : x
  2. Step 2: Convert to fraction form
    50,372/78,620 = 78,620/x
  3. Step 3: Cross multiply
    50,372x = 78,620 × 78,620
  4. Step 4: Simplify right side
    50,372x = 6,181,104,400
  5. Step 5: Solve for x
    x = 6,181,104,400/50,372
  6. Step 6: Final answer
    x = 122,709.13

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.