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Finding the Third Proportional to 78,395 and 117,769

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Solution

The third proportional to 78,395 and 117,769 is: 176,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,395 : 117,769 = 117,769 : x
  2. Step 2: Convert to fraction form
    78,395/117,769 = 117,769/x
  3. Step 3: Cross multiply
    78,395x = 117,769 × 117,769
  4. Step 4: Simplify right side
    78,395x = 13,869,537,361
  5. Step 5: Solve for x
    x = 13,869,537,361/78,395
  6. Step 6: Final answer
    x = 176,918.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.