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Finding the Third Proportional to 69.56 and 145.75

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Solution

The third proportional to 69.56 and 145.75 is: 305.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.56 : 145.75 = 145.75 : x
  2. Step 2: Convert to fraction form
    69.56/145.75 = 145.75/x
  3. Step 3: Cross multiply
    69.56x = 145.75 × 145.75
  4. Step 4: Simplify right side
    69.56x = 21,243.06
  5. Step 5: Solve for x
    x = 21,243.06/69.56
  6. Step 6: Final answer
    x = 305.38

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.