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Finding the Third Proportional to 78,216.75 and 170,772.75

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Solution

The third proportional to 78,216.75 and 170,772.75 is: 372,852.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,216.75 : 170,772.75 = 170,772.75 : x
  2. Step 2: Convert to fraction form
    78,216.75/170,772.75 = 170,772.75/x
  3. Step 3: Cross multiply
    78,216.75x = 170,772.75 × 170,772.75
  4. Step 4: Simplify right side
    78,216.75x = 29,163,332,142.56
  5. Step 5: Solve for x
    x = 29,163,332,142.56/78,216.75
  6. Step 6: Final answer
    x = 372,852.77

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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.