Home / 87,939.40-131,822.70-78,608.20

Finding the Fourth Proportional to 87,939.40, 131,822.70 and 78,608.20

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Solution

The fourth proportional to 87,939.40, 131,822.70 and 78,608.20 is: 117,835.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,939.40 : 131,822.70 = 78,608.20 : x
  2. Step 2: Convert to fraction form
    87,939.40/131,822.70 = 78,608.20/x
  3. Step 3: Cross multiply
    87,939.40x = 131,822.70 × 78,608.20
  4. Step 4: Simplify right side
    87,939.40x = 10,362,345,166.14
  5. Step 5: Solve for x
    x = 10,362,345,166.14/87,939.40
  6. Step 6: Final answer
    x = 117,835.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.