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Finding the Third Proportional to 75.75 and 153.19

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Solution

The third proportional to 75.75 and 153.19 is: 309.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.75 : 153.19 = 153.19 : x
  2. Step 2: Convert to fraction form
    75.75/153.19 = 153.19/x
  3. Step 3: Cross multiply
    75.75x = 153.19 × 153.19
  4. Step 4: Simplify right side
    75.75x = 23,466.41
  5. Step 5: Solve for x
    x = 23,466.41/75.75
  6. Step 6: Final answer
    x = 309.79

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.