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Finding the Third Proportional to 128,760.19 and 279,686.06

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Solution

The third proportional to 128,760.19 and 279,686.06 is: 607,519.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,760.19 : 279,686.06 = 279,686.06 : x
  2. Step 2: Convert to fraction form
    128,760.19/279,686.06 = 279,686.06/x
  3. Step 3: Cross multiply
    128,760.19x = 279,686.06 × 279,686.06
  4. Step 4: Simplify right side
    128,760.19x = 78,224,293,556.75
  5. Step 5: Solve for x
    x = 78,224,293,556.75/128,760.19
  6. Step 6: Final answer
    x = 607,519.26

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.