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Finding the Third Proportional to 139,873 and 210,970

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Solution

The third proportional to 139,873 and 210,970 is: 318,205.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,873 : 210,970 = 210,970 : x
  2. Step 2: Convert to fraction form
    139,873/210,970 = 210,970/x
  3. Step 3: Cross multiply
    139,873x = 210,970 × 210,970
  4. Step 4: Simplify right side
    139,873x = 44,508,340,900
  5. Step 5: Solve for x
    x = 44,508,340,900/139,873
  6. Step 6: Final answer
    x = 318,205.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.