Home / 87,859.86-121,255.29-50,139.78

Finding the Fourth Proportional to 87,859.86, 121,255.29 and 50,139.78

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Solution

The fourth proportional to 87,859.86, 121,255.29 and 50,139.78 is: 69,197.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,859.86 : 121,255.29 = 50,139.78 : x
  2. Step 2: Convert to fraction form
    87,859.86/121,255.29 = 50,139.78/x
  3. Step 3: Cross multiply
    87,859.86x = 121,255.29 × 50,139.78
  4. Step 4: Simplify right side
    87,859.86x = 6,079,713,564.44
  5. Step 5: Solve for x
    x = 6,079,713,564.44/87,859.86
  6. Step 6: Final answer
    x = 69,197.85

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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.