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Finding the Third Proportional to 129,874.50 and 207,480

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Solution

The third proportional to 129,874.50 and 207,480 is: 331,458.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,874.50 : 207,480 = 207,480 : x
  2. Step 2: Convert to fraction form
    129,874.50/207,480 = 207,480/x
  3. Step 3: Cross multiply
    129,874.50x = 207,480 × 207,480
  4. Step 4: Simplify right side
    129,874.50x = 43,047,950,400
  5. Step 5: Solve for x
    x = 43,047,950,400/129,874.50
  6. Step 6: Final answer
    x = 331,458.06

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.