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Finding the Third Proportional to 79,979.25 and 121,696.50

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Solution

The third proportional to 79,979.25 and 121,696.50 is: 185,173.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,979.25 : 121,696.50 = 121,696.50 : x
  2. Step 2: Convert to fraction form
    79,979.25/121,696.50 = 121,696.50/x
  3. Step 3: Cross multiply
    79,979.25x = 121,696.50 × 121,696.50
  4. Step 4: Simplify right side
    79,979.25x = 14,810,038,112.25
  5. Step 5: Solve for x
    x = 14,810,038,112.25/79,979.25
  6. Step 6: Final answer
    x = 185,173.51

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.