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Finding the Third Proportional to 20,604,780 and 40,690,971

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Solution

The third proportional to 20,604,780 and 40,690,971 is: 80,357,816.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604,780 : 40,690,971 = 40,690,971 : x
  2. Step 2: Convert to fraction form
    20,604,780/40,690,971 = 40,690,971/x
  3. Step 3: Cross multiply
    20,604,780x = 40,690,971 × 40,690,971
  4. Step 4: Simplify right side
    20,604,780x = 1,655,755,120,922,841
  5. Step 5: Solve for x
    x = 1,655,755,120,922,841/20,604,780
  6. Step 6: Final answer
    x = 80,357,816.05

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.