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Finding the Third Proportional to 120,556.69 and 257,721.75

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Solution

The third proportional to 120,556.69 and 257,721.75 is: 550,948.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,556.69 : 257,721.75 = 257,721.75 : x
  2. Step 2: Convert to fraction form
    120,556.69/257,721.75 = 257,721.75/x
  3. Step 3: Cross multiply
    120,556.69x = 257,721.75 × 257,721.75
  4. Step 4: Simplify right side
    120,556.69x = 66,420,500,423.06
  5. Step 5: Solve for x
    x = 66,420,500,423.06/120,556.69
  6. Step 6: Final answer
    x = 550,948.29

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.