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Finding the Third Proportional to 36,439.50 and 78,468

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Solution

The third proportional to 36,439.50 and 78,468 is: 168,971.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,439.50 : 78,468 = 78,468 : x
  2. Step 2: Convert to fraction form
    36,439.50/78,468 = 78,468/x
  3. Step 3: Cross multiply
    36,439.50x = 78,468 × 78,468
  4. Step 4: Simplify right side
    36,439.50x = 6,157,227,024
  5. Step 5: Solve for x
    x = 6,157,227,024/36,439.50
  6. Step 6: Final answer
    x = 168,971.23

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.