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Finding the Third Proportional to 78,661.50 and 117,969.75

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Solution

The third proportional to 78,661.50 and 117,969.75 is: 176,920.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,661.50 : 117,969.75 = 117,969.75 : x
  2. Step 2: Convert to fraction form
    78,661.50/117,969.75 = 117,969.75/x
  3. Step 3: Cross multiply
    78,661.50x = 117,969.75 × 117,969.75
  4. Step 4: Simplify right side
    78,661.50x = 13,916,861,915.06
  5. Step 5: Solve for x
    x = 13,916,861,915.06/78,661.50
  6. Step 6: Final answer
    x = 176,920.88

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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.