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Finding the Fourth Proportional to 279,726.94, 419,491.59 and 90,179.65

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Solution

The fourth proportional to 279,726.94, 419,491.59 and 90,179.65 is: 135,237.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,726.94 : 419,491.59 = 90,179.65 : x
  2. Step 2: Convert to fraction form
    279,726.94/419,491.59 = 90,179.65/x
  3. Step 3: Cross multiply
    279,726.94x = 419,491.59 × 90,179.65
  4. Step 4: Simplify right side
    279,726.94x = 37,829,604,764.14
  5. Step 5: Solve for x
    x = 37,829,604,764.14/279,726.94
  6. Step 6: Final answer
    x = 135,237.62

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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.