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Finding the Third Proportional to 39,128 and 86,984

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Solution

The third proportional to 39,128 and 86,984 is: 193,370.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,128 : 86,984 = 86,984 : x
  2. Step 2: Convert to fraction form
    39,128/86,984 = 86,984/x
  3. Step 3: Cross multiply
    39,128x = 86,984 × 86,984
  4. Step 4: Simplify right side
    39,128x = 7,566,216,256
  5. Step 5: Solve for x
    x = 7,566,216,256/39,128
  6. Step 6: Final answer
    x = 193,370.89

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.