Home / 87,975.40-131,876.70-78,644.20

Finding the Fourth Proportional to 87,975.40, 131,876.70 and 78,644.20

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Solution

The fourth proportional to 87,975.40, 131,876.70 and 78,644.20 is: 117,889.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,975.40 : 131,876.70 = 78,644.20 : x
  2. Step 2: Convert to fraction form
    87,975.40/131,876.70 = 78,644.20/x
  3. Step 3: Cross multiply
    87,975.40x = 131,876.70 × 78,644.20
  4. Step 4: Simplify right side
    87,975.40x = 10,371,337,570.14
  5. Step 5: Solve for x
    x = 10,371,337,570.14/87,975.40
  6. Step 6: Final answer
    x = 117,889.06

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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.