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Finding the Third Proportional to 128,650,275 and 198,786,003.19

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Solution

The third proportional to 128,650,275 and 198,786,003.19 is: 307,157,330.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,650,275 : 198,786,003.19 = 198,786,003.19 : x
  2. Step 2: Convert to fraction form
    128,650,275/198,786,003.19 = 198,786,003.19/x
  3. Step 3: Cross multiply
    128,650,275x = 198,786,003.19 × 198,786,003.19
  4. Step 4: Simplify right side
    128,650,275x = 39,515,875,063,260,760
  5. Step 5: Solve for x
    x = 39,515,875,063,260,760/128,650,275
  6. Step 6: Final answer
    x = 307,157,330.70

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.