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Finding the Third Proportional to 77,984.50 and 117,531

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Solution

The third proportional to 77,984.50 and 117,531 is: 177,131.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,984.50 : 117,531 = 117,531 : x
  2. Step 2: Convert to fraction form
    77,984.50/117,531 = 117,531/x
  3. Step 3: Cross multiply
    77,984.50x = 117,531 × 117,531
  4. Step 4: Simplify right side
    77,984.50x = 13,813,535,961
  5. Step 5: Solve for x
    x = 13,813,535,961/77,984.50
  6. Step 6: Final answer
    x = 177,131.81

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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.