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Finding the Fourth Proportional to 143,891.91, 215,839.69 and 55,150.74

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Solution

The fourth proportional to 143,891.91, 215,839.69 and 55,150.74 is: 82,726.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,891.91 : 215,839.69 = 55,150.74 : x
  2. Step 2: Convert to fraction form
    143,891.91/215,839.69 = 55,150.74/x
  3. Step 3: Cross multiply
    143,891.91x = 215,839.69 × 55,150.74
  4. Step 4: Simplify right side
    143,891.91x = 11,903,718,486.99
  5. Step 5: Solve for x
    x = 11,903,718,486.99/143,891.91
  6. Step 6: Final answer
    x = 82,726.81

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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.