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Finding the Fourth Proportional to 143,988.83, 215,988.71 and 55,251.30

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Solution

The fourth proportional to 143,988.83, 215,988.71 and 55,251.30 is: 82,879.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,988.83 : 215,988.71 = 55,251.30 : x
  2. Step 2: Convert to fraction form
    143,988.83/215,988.71 = 55,251.30/x
  3. Step 3: Cross multiply
    143,988.83x = 215,988.71 × 55,251.30
  4. Step 4: Simplify right side
    143,988.83x = 11,933,656,736.57
  5. Step 5: Solve for x
    x = 11,933,656,736.57/143,988.83
  6. Step 6: Final answer
    x = 82,879.05

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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.