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Finding the Third Proportional to 76,420 and 167,603

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Solution

The third proportional to 76,420 and 167,603 is: 367,583.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,420 : 167,603 = 167,603 : x
  2. Step 2: Convert to fraction form
    76,420/167,603 = 167,603/x
  3. Step 3: Cross multiply
    76,420x = 167,603 × 167,603
  4. Step 4: Simplify right side
    76,420x = 28,090,765,609
  5. Step 5: Solve for x
    x = 28,090,765,609/76,420
  6. Step 6: Final answer
    x = 367,583.95

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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.