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Finding the Third Proportional to 76,728 and 167,688

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Solution

The third proportional to 76,728 and 167,688 is: 366,479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,728 : 167,688 = 167,688 : x
  2. Step 2: Convert to fraction form
    76,728/167,688 = 167,688/x
  3. Step 3: Cross multiply
    76,728x = 167,688 × 167,688
  4. Step 4: Simplify right side
    76,728x = 28,119,265,344
  5. Step 5: Solve for x
    x = 28,119,265,344/76,728
  6. Step 6: Final answer
    x = 366,479.84

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.