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Finding the Third Proportional to 66 and 144.75

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Solution

The third proportional to 66 and 144.75 is: 317.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66 : 144.75 = 144.75 : x
  2. Step 2: Convert to fraction form
    66/144.75 = 144.75/x
  3. Step 3: Cross multiply
    66x = 144.75 × 144.75
  4. Step 4: Simplify right side
    66x = 20,952.56
  5. Step 5: Solve for x
    x = 20,952.56/66
  6. Step 6: Final answer
    x = 317.46

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.