Home / 106,488.20-159,399.90-78,439.88

Finding the Fourth Proportional to 106,488.20, 159,399.90 and 78,439.88

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Solution

The fourth proportional to 106,488.20, 159,399.90 and 78,439.88 is: 117,414.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,488.20 : 159,399.90 = 78,439.88 : x
  2. Step 2: Convert to fraction form
    106,488.20/159,399.90 = 78,439.88/x
  3. Step 3: Cross multiply
    106,488.20x = 159,399.90 × 78,439.88
  4. Step 4: Simplify right side
    106,488.20x = 12,503,309,028.01
  5. Step 5: Solve for x
    x = 12,503,309,028.01/106,488.20
  6. Step 6: Final answer
    x = 117,414.97

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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.