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Finding the Third Proportional to 115,200 and 156,276

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Solution

The third proportional to 115,200 and 156,276 is: 211,998.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,200 : 156,276 = 156,276 : x
  2. Step 2: Convert to fraction form
    115,200/156,276 = 156,276/x
  3. Step 3: Cross multiply
    115,200x = 156,276 × 156,276
  4. Step 4: Simplify right side
    115,200x = 24,422,188,176
  5. Step 5: Solve for x
    x = 24,422,188,176/115,200
  6. Step 6: Final answer
    x = 211,998.16

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.