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Finding the Third Proportional to 28,321 and 66,145

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Solution

The third proportional to 28,321 and 66,145 is: 154,484.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321 : 66,145 = 66,145 : x
  2. Step 2: Convert to fraction form
    28,321/66,145 = 66,145/x
  3. Step 3: Cross multiply
    28,321x = 66,145 × 66,145
  4. Step 4: Simplify right side
    28,321x = 4,375,161,025
  5. Step 5: Solve for x
    x = 4,375,161,025/28,321
  6. Step 6: Final answer
    x = 154,484.69

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.