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Finding the Third Proportional to 57.07 and 121.74

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Solution

The third proportional to 57.07 and 121.74 is: 259.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.07 : 121.74 = 121.74 : x
  2. Step 2: Convert to fraction form
    57.07/121.74 = 121.74/x
  3. Step 3: Cross multiply
    57.07x = 121.74 × 121.74
  4. Step 4: Simplify right side
    57.07x = 14,819.97
  5. Step 5: Solve for x
    x = 14,819.97/57.07
  6. Step 6: Final answer
    x = 259.67

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.