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Finding the Third Proportional to 139,852 and 209,778

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Solution

The third proportional to 139,852 and 209,778 is: 314,667

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,852 : 209,778 = 209,778 : x
  2. Step 2: Convert to fraction form
    139,852/209,778 = 209,778/x
  3. Step 3: Cross multiply
    139,852x = 209,778 × 209,778
  4. Step 4: Simplify right side
    139,852x = 44,006,809,284
  5. Step 5: Solve for x
    x = 44,006,809,284/139,852
  6. Step 6: Final answer
    x = 314,667

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.