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Finding the Third Proportional to 128,650,282 and 198,786,012

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Solution

The third proportional to 128,650,282 and 198,786,012 is: 307,157,341.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,650,282 : 198,786,012 = 198,786,012 : x
  2. Step 2: Convert to fraction form
    128,650,282/198,786,012 = 198,786,012/x
  3. Step 3: Cross multiply
    128,650,282x = 198,786,012 × 198,786,012
  4. Step 4: Simplify right side
    128,650,282x = 39,515,878,566,864,144
  5. Step 5: Solve for x
    x = 39,515,878,566,864,144/128,650,282
  6. Step 6: Final answer
    x = 307,157,341.22

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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.