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Finding the Third Proportional to 128,911.50 and 276,864.75

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Solution

The third proportional to 128,911.50 and 276,864.75 is: 594,625.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,911.50 : 276,864.75 = 276,864.75 : x
  2. Step 2: Convert to fraction form
    128,911.50/276,864.75 = 276,864.75/x
  3. Step 3: Cross multiply
    128,911.50x = 276,864.75 × 276,864.75
  4. Step 4: Simplify right side
    128,911.50x = 76,654,089,792.56
  5. Step 5: Solve for x
    x = 76,654,089,792.56/128,911.50
  6. Step 6: Final answer
    x = 594,625.69

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.