Home / 87,222.18-120,326.40-51,387.78

Finding the Fourth Proportional to 87,222.18, 120,326.40 and 51,387.78

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Solution

The fourth proportional to 87,222.18, 120,326.40 and 51,387.78 is: 70,891.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,222.18 : 120,326.40 = 51,387.78 : x
  2. Step 2: Convert to fraction form
    87,222.18/120,326.40 = 51,387.78/x
  3. Step 3: Cross multiply
    87,222.18x = 120,326.40 × 51,387.78
  4. Step 4: Simplify right side
    87,222.18x = 6,183,306,571.39
  5. Step 5: Solve for x
    x = 6,183,306,571.39/87,222.18
  6. Step 6: Final answer
    x = 70,891.45

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1.5x scale

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.