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Finding the Third Proportional to 78,271 and 117,765

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Solution

The third proportional to 78,271 and 117,765 is: 177,186.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,271 : 117,765 = 117,765 : x
  2. Step 2: Convert to fraction form
    78,271/117,765 = 117,765/x
  3. Step 3: Cross multiply
    78,271x = 117,765 × 117,765
  4. Step 4: Simplify right side
    78,271x = 13,868,595,225
  5. Step 5: Solve for x
    x = 13,868,595,225/78,271
  6. Step 6: Final answer
    x = 177,186.89

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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.