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Finding the Third Proportional to 68.75 and 117.38

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Solution

The third proportional to 68.75 and 117.38 is: 200.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.75 : 117.38 = 117.38 : x
  2. Step 2: Convert to fraction form
    68.75/117.38 = 117.38/x
  3. Step 3: Cross multiply
    68.75x = 117.38 × 117.38
  4. Step 4: Simplify right side
    68.75x = 13,776.89
  5. Step 5: Solve for x
    x = 13,776.89/68.75
  6. Step 6: Final answer
    x = 200.39

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.