Home / 87,118.78-120,218.38-51,301.87

Finding the Fourth Proportional to 87,118.78, 120,218.38 and 51,301.87

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Solution

The fourth proportional to 87,118.78, 120,218.38 and 51,301.87 is: 70,793.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,118.78 : 120,218.38 = 51,301.87 : x
  2. Step 2: Convert to fraction form
    87,118.78/120,218.38 = 51,301.87/x
  3. Step 3: Cross multiply
    87,118.78x = 120,218.38 × 51,301.87
  4. Step 4: Simplify right side
    87,118.78x = 6,167,427,702.37
  5. Step 5: Solve for x
    x = 6,167,427,702.37/87,118.78
  6. Step 6: Final answer
    x = 70,793.32

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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.