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Finding the Fourth Proportional to 143,908.56, 215,739.72 and 55,225.71

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Solution

The fourth proportional to 143,908.56, 215,739.72 and 55,225.71 is: 82,791.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,908.56 : 215,739.72 = 55,225.71 : x
  2. Step 2: Convert to fraction form
    143,908.56/215,739.72 = 55,225.71/x
  3. Step 3: Cross multiply
    143,908.56x = 215,739.72 × 55,225.71
  4. Step 4: Simplify right side
    143,908.56x = 11,914,379,212.20
  5. Step 5: Solve for x
    x = 11,914,379,212.20/143,908.56
  6. Step 6: Final answer
    x = 82,791.32

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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.