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Finding the Third Proportional to 39,020 and 84,172

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Solution

The third proportional to 39,020 and 84,172 is: 181,571.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,020 : 84,172 = 84,172 : x
  2. Step 2: Convert to fraction form
    39,020/84,172 = 84,172/x
  3. Step 3: Cross multiply
    39,020x = 84,172 × 84,172
  4. Step 4: Simplify right side
    39,020x = 7,084,925,584
  5. Step 5: Solve for x
    x = 7,084,925,584/39,020
  6. Step 6: Final answer
    x = 181,571.64

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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.