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Finding the Third Proportional to 56.75 and 138.13

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Solution

The third proportional to 56.75 and 138.13 is: 336.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.75 : 138.13 = 138.13 : x
  2. Step 2: Convert to fraction form
    56.75/138.13 = 138.13/x
  3. Step 3: Cross multiply
    56.75x = 138.13 × 138.13
  4. Step 4: Simplify right side
    56.75x = 19,078.52
  5. Step 5: Solve for x
    x = 19,078.52/56.75
  6. Step 6: Final answer
    x = 336.19

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Why These Related Problems?

These problems maintain the same ratio (2.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.