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Finding the Third Proportional to 139,831,886 and 211,690,821

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Solution

The third proportional to 139,831,886 and 211,690,821 is: 320,477,717.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,831,886 : 211,690,821 = 211,690,821 : x
  2. Step 2: Convert to fraction form
    139,831,886/211,690,821 = 211,690,821/x
  3. Step 3: Cross multiply
    139,831,886x = 211,690,821 × 211,690,821
  4. Step 4: Simplify right side
    139,831,886x = 44,813,003,695,654,040
  5. Step 5: Solve for x
    x = 44,813,003,695,654,040/139,831,886
  6. Step 6: Final answer
    x = 320,477,717.76

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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.