Home / 217,974.87-300,832.20-122,479.50

Finding the Fourth Proportional to 217,974.87, 300,832.20 and 122,479.50

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Solution

The fourth proportional to 217,974.87, 300,832.20 and 122,479.50 is: 169,036.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,974.87 : 300,832.20 = 122,479.50 : x
  2. Step 2: Convert to fraction form
    217,974.87/300,832.20 = 122,479.50/x
  3. Step 3: Cross multiply
    217,974.87x = 300,832.20 × 122,479.50
  4. Step 4: Simplify right side
    217,974.87x = 36,845,777,439.90
  5. Step 5: Solve for x
    x = 36,845,777,439.90/217,974.87
  6. Step 6: Final answer
    x = 169,036.81

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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.