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Finding the Third Proportional to 129,912 and 190,260

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Solution

The third proportional to 129,912 and 190,260 is: 278,641.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,912 : 190,260 = 190,260 : x
  2. Step 2: Convert to fraction form
    129,912/190,260 = 190,260/x
  3. Step 3: Cross multiply
    129,912x = 190,260 × 190,260
  4. Step 4: Simplify right side
    129,912x = 36,198,867,600
  5. Step 5: Solve for x
    x = 36,198,867,600/129,912
  6. Step 6: Final answer
    x = 278,641.45

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.