Home / 87,205.57-120,329.21-51,390.72

Finding the Fourth Proportional to 87,205.57, 120,329.21 and 51,390.72

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Solution

The fourth proportional to 87,205.57, 120,329.21 and 51,390.72 is: 70,910.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,205.57 : 120,329.21 = 51,390.72 : x
  2. Step 2: Convert to fraction form
    87,205.57/120,329.21 = 51,390.72/x
  3. Step 3: Cross multiply
    87,205.57x = 120,329.21 × 51,390.72
  4. Step 4: Simplify right side
    87,205.57x = 6,183,804,738.93
  5. Step 5: Solve for x
    x = 6,183,804,738.93/87,205.57
  6. Step 6: Final answer
    x = 70,910.66

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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.