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Finding the Fourth Proportional to 150,647.91, 207,896.54 and 86,991.27

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Solution

The fourth proportional to 150,647.91, 207,896.54 and 86,991.27 is: 120,049.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,647.91 : 207,896.54 = 86,991.27 : x
  2. Step 2: Convert to fraction form
    150,647.91/207,896.54 = 86,991.27/x
  3. Step 3: Cross multiply
    150,647.91x = 207,896.54 × 86,991.27
  4. Step 4: Simplify right side
    150,647.91x = 18,085,183,608.25
  5. Step 5: Solve for x
    x = 18,085,183,608.25/150,647.91
  6. Step 6: Final answer
    x = 120,049.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.