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Finding the Third Proportional to 74,738 and 156,400

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Solution

The third proportional to 74,738 and 156,400 is: 327,289.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,738 : 156,400 = 156,400 : x
  2. Step 2: Convert to fraction form
    74,738/156,400 = 156,400/x
  3. Step 3: Cross multiply
    74,738x = 156,400 × 156,400
  4. Step 4: Simplify right side
    74,738x = 24,460,960,000
  5. Step 5: Solve for x
    x = 24,460,960,000/74,738
  6. Step 6: Final answer
    x = 327,289.46

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.