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Finding the Third Proportional to 128,725 and 199,314

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Solution

The third proportional to 128,725 and 199,314 is: 308,611.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,725 : 199,314 = 199,314 : x
  2. Step 2: Convert to fraction form
    128,725/199,314 = 199,314/x
  3. Step 3: Cross multiply
    128,725x = 199,314 × 199,314
  4. Step 4: Simplify right side
    128,725x = 39,726,070,596
  5. Step 5: Solve for x
    x = 39,726,070,596/128,725
  6. Step 6: Final answer
    x = 308,611.93

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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.