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Finding the Third Proportional to 30.19 and 72.19

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Solution

The third proportional to 30.19 and 72.19 is: 172.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.19 : 72.19 = 72.19 : x
  2. Step 2: Convert to fraction form
    30.19/72.19 = 72.19/x
  3. Step 3: Cross multiply
    30.19x = 72.19 × 72.19
  4. Step 4: Simplify right side
    30.19x = 5,211.04
  5. Step 5: Solve for x
    x = 5,211.04/30.19
  6. Step 6: Final answer
    x = 172.62

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.