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Finding the Third Proportional to 71.25 and 153.81

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Solution

The third proportional to 71.25 and 153.81 is: 332.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.25 : 153.81 = 153.81 : x
  2. Step 2: Convert to fraction form
    71.25/153.81 = 153.81/x
  3. Step 3: Cross multiply
    71.25x = 153.81 × 153.81
  4. Step 4: Simplify right side
    71.25x = 23,658.29
  5. Step 5: Solve for x
    x = 23,658.29/71.25
  6. Step 6: Final answer
    x = 332.05

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.