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Finding the Third Proportional to 69.79 and 102.66

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Solution

The third proportional to 69.79 and 102.66 is: 151.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.79 : 102.66 = 102.66 : x
  2. Step 2: Convert to fraction form
    69.79/102.66 = 102.66/x
  3. Step 3: Cross multiply
    69.79x = 102.66 × 102.66
  4. Step 4: Simplify right side
    69.79x = 10,538.31
  5. Step 5: Solve for x
    x = 10,538.31/69.79
  6. Step 6: Final answer
    x = 151.01

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.