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Finding the Third Proportional to 130 and 166.25

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Solution

The third proportional to 130 and 166.25 is: 212.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    130 : 166.25 = 166.25 : x
  2. Step 2: Convert to fraction form
    130/166.25 = 166.25/x
  3. Step 3: Cross multiply
    130x = 166.25 × 166.25
  4. Step 4: Simplify right side
    130x = 27,639.06
  5. Step 5: Solve for x
    x = 27,639.06/130
  6. Step 6: Final answer
    x = 212.61

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.