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Finding the Third Proportional to 72,147 and 156,615

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Solution

The third proportional to 72,147 and 156,615 is: 339,976.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,147 : 156,615 = 156,615 : x
  2. Step 2: Convert to fraction form
    72,147/156,615 = 156,615/x
  3. Step 3: Cross multiply
    72,147x = 156,615 × 156,615
  4. Step 4: Simplify right side
    72,147x = 24,528,258,225
  5. Step 5: Solve for x
    x = 24,528,258,225/72,147
  6. Step 6: Final answer
    x = 339,976.14

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.