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Finding the Third Proportional to 139,837,220 and 211,697,940

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Solution

The third proportional to 139,837,220 and 211,697,940 is: 320,487,047.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,837,220 : 211,697,940 = 211,697,940 : x
  2. Step 2: Convert to fraction form
    139,837,220/211,697,940 = 211,697,940/x
  3. Step 3: Cross multiply
    139,837,220x = 211,697,940 × 211,697,940
  4. Step 4: Simplify right side
    139,837,220x = 44,816,017,800,243,600
  5. Step 5: Solve for x
    x = 44,816,017,800,243,600/139,837,220
  6. Step 6: Final answer
    x = 320,487,047.73

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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.