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Finding the Third Proportional to 74,420 and 163,580

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Solution

The third proportional to 74,420 and 163,580 is: 359,559.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,420 : 163,580 = 163,580 : x
  2. Step 2: Convert to fraction form
    74,420/163,580 = 163,580/x
  3. Step 3: Cross multiply
    74,420x = 163,580 × 163,580
  4. Step 4: Simplify right side
    74,420x = 26,758,416,400
  5. Step 5: Solve for x
    x = 26,758,416,400/74,420
  6. Step 6: Final answer
    x = 359,559.48

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.