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Finding the Third Proportional to 78,828 and 115,937

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Solution

The third proportional to 78,828 and 115,937 is: 170,515.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,828 : 115,937 = 115,937 : x
  2. Step 2: Convert to fraction form
    78,828/115,937 = 115,937/x
  3. Step 3: Cross multiply
    78,828x = 115,937 × 115,937
  4. Step 4: Simplify right side
    78,828x = 13,441,387,969
  5. Step 5: Solve for x
    x = 13,441,387,969/78,828
  6. Step 6: Final answer
    x = 170,515.40

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.