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Finding the Third Proportional to 128,169,332 and 198,586,983

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Solution

The third proportional to 128,169,332 and 198,586,983 is: 307,692,871.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,169,332 : 198,586,983 = 198,586,983 : x
  2. Step 2: Convert to fraction form
    128,169,332/198,586,983 = 198,586,983/x
  3. Step 3: Cross multiply
    128,169,332x = 198,586,983 × 198,586,983
  4. Step 4: Simplify right side
    128,169,332x = 39,436,789,817,042,288
  5. Step 5: Solve for x
    x = 39,436,789,817,042,288/128,169,332
  6. Step 6: Final answer
    x = 307,692,871.62

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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.