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Finding the Third Proportional to 129,705 and 200,312

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Solution

The third proportional to 129,705 and 200,312 is: 309,355.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,705 : 200,312 = 200,312 : x
  2. Step 2: Convert to fraction form
    129,705/200,312 = 200,312/x
  3. Step 3: Cross multiply
    129,705x = 200,312 × 200,312
  4. Step 4: Simplify right side
    129,705x = 40,124,897,344
  5. Step 5: Solve for x
    x = 40,124,897,344/129,705
  6. Step 6: Final answer
    x = 309,355.05

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.