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Finding the Third Proportional to 64,612 and 87,276

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Solution

The third proportional to 64,612 and 87,276 is: 117,889.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,612 : 87,276 = 87,276 : x
  2. Step 2: Convert to fraction form
    64,612/87,276 = 87,276/x
  3. Step 3: Cross multiply
    64,612x = 87,276 × 87,276
  4. Step 4: Simplify right side
    64,612x = 7,617,100,176
  5. Step 5: Solve for x
    x = 7,617,100,176/64,612
  6. Step 6: Final answer
    x = 117,889.87

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.