Home / 279,579.12-418,737.78-129,504.12

Finding the Fourth Proportional to 279,579.12, 418,737.78 and 129,504.12

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Solution

The fourth proportional to 279,579.12, 418,737.78 and 129,504.12 is: 193,963.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,579.12 : 418,737.78 = 129,504.12 : x
  2. Step 2: Convert to fraction form
    279,579.12/418,737.78 = 129,504.12/x
  3. Step 3: Cross multiply
    279,579.12x = 418,737.78 × 129,504.12
  4. Step 4: Simplify right side
    279,579.12x = 54,228,267,709.65
  5. Step 5: Solve for x
    x = 54,228,267,709.65/279,579.12
  6. Step 6: Final answer
    x = 193,963.94

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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.