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Finding the Third Proportional to 77,991.75 and 117,685.50

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Solution

The third proportional to 77,991.75 and 117,685.50 is: 177,581.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,991.75 : 117,685.50 = 117,685.50 : x
  2. Step 2: Convert to fraction form
    77,991.75/117,685.50 = 117,685.50/x
  3. Step 3: Cross multiply
    77,991.75x = 117,685.50 × 117,685.50
  4. Step 4: Simplify right side
    77,991.75x = 13,849,876,910.25
  5. Step 5: Solve for x
    x = 13,849,876,910.25/77,991.75
  6. Step 6: Final answer
    x = 177,581.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.