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Finding the Third Proportional to 81,328.50 and 118,287

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Solution

The third proportional to 81,328.50 and 118,287 is: 172,040.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,328.50 : 118,287 = 118,287 : x
  2. Step 2: Convert to fraction form
    81,328.50/118,287 = 118,287/x
  3. Step 3: Cross multiply
    81,328.50x = 118,287 × 118,287
  4. Step 4: Simplify right side
    81,328.50x = 13,991,814,369
  5. Step 5: Solve for x
    x = 13,991,814,369/81,328.50
  6. Step 6: Final answer
    x = 172,040.73

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.