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Finding the Third Proportional to 78,639.50 and 171,102.75

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Solution

The third proportional to 78,639.50 and 171,102.75 is: 372,283.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639.50 : 171,102.75 = 171,102.75 : x
  2. Step 2: Convert to fraction form
    78,639.50/171,102.75 = 171,102.75/x
  3. Step 3: Cross multiply
    78,639.50x = 171,102.75 × 171,102.75
  4. Step 4: Simplify right side
    78,639.50x = 29,276,151,057.56
  5. Step 5: Solve for x
    x = 29,276,151,057.56/78,639.50
  6. Step 6: Final answer
    x = 372,283.03

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.