Home / 70,818.11-106,190.55-20,891.84

Finding the Fourth Proportional to 70,818.11, 106,190.55 and 20,891.84

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Solution

The fourth proportional to 70,818.11, 106,190.55 and 20,891.84 is: 31,326.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,818.11 : 106,190.55 = 20,891.84 : x
  2. Step 2: Convert to fraction form
    70,818.11/106,190.55 = 20,891.84/x
  3. Step 3: Cross multiply
    70,818.11x = 106,190.55 × 20,891.84
  4. Step 4: Simplify right side
    70,818.11x = 2,218,515,449.16
  5. Step 5: Solve for x
    x = 2,218,515,449.16/70,818.11
  6. Step 6: Final answer
    x = 31,326.95

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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.