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Finding the Third Proportional to 55.36 and 118.78

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Solution

The third proportional to 55.36 and 118.78 is: 254.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.36 : 118.78 = 118.78 : x
  2. Step 2: Convert to fraction form
    55.36/118.78 = 118.78/x
  3. Step 3: Cross multiply
    55.36x = 118.78 × 118.78
  4. Step 4: Simplify right side
    55.36x = 14,108.99
  5. Step 5: Solve for x
    x = 14,108.99/55.36
  6. Step 6: Final answer
    x = 254.86

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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.