Home / 81,559.20-122,309.42-28,236.70

Finding the Fourth Proportional to 81,559.20, 122,309.42 and 28,236.70

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Solution

The fourth proportional to 81,559.20, 122,309.42 and 28,236.70 is: 42,344.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,559.20 : 122,309.42 = 28,236.70 : x
  2. Step 2: Convert to fraction form
    81,559.20/122,309.42 = 28,236.70/x
  3. Step 3: Cross multiply
    81,559.20x = 122,309.42 × 28,236.70
  4. Step 4: Simplify right side
    81,559.20x = 3,453,614,399.71
  5. Step 5: Solve for x
    x = 3,453,614,399.71/81,559.20
  6. Step 6: Final answer
    x = 42,344.88

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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.