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Finding the Third Proportional to 74,784 and 164,400

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Solution

The third proportional to 74,784 and 164,400 is: 361,405.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,784 : 164,400 = 164,400 : x
  2. Step 2: Convert to fraction form
    74,784/164,400 = 164,400/x
  3. Step 3: Cross multiply
    74,784x = 164,400 × 164,400
  4. Step 4: Simplify right side
    74,784x = 27,027,360,000
  5. Step 5: Solve for x
    x = 27,027,360,000/74,784
  6. Step 6: Final answer
    x = 361,405.65

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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.