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Finding the Third Proportional to 87,481.50 and 128,428.50

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Solution

The third proportional to 87,481.50 and 128,428.50 is: 188,541.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,481.50 : 128,428.50 = 128,428.50 : x
  2. Step 2: Convert to fraction form
    87,481.50/128,428.50 = 128,428.50/x
  3. Step 3: Cross multiply
    87,481.50x = 128,428.50 × 128,428.50
  4. Step 4: Simplify right side
    87,481.50x = 16,493,879,612.25
  5. Step 5: Solve for x
    x = 16,493,879,612.25/87,481.50
  6. Step 6: Final answer
    x = 188,541.34

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.