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Finding the Fourth Proportional to 143,508.56, 215,395.85 and 72,481.08

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Solution

The fourth proportional to 143,508.56, 215,395.85 and 72,481.08 is: 108,788.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,508.56 : 215,395.85 = 72,481.08 : x
  2. Step 2: Convert to fraction form
    143,508.56/215,395.85 = 72,481.08/x
  3. Step 3: Cross multiply
    143,508.56x = 215,395.85 × 72,481.08
  4. Step 4: Simplify right side
    143,508.56x = 15,612,122,758.54
  5. Step 5: Solve for x
    x = 15,612,122,758.54/143,508.56
  6. Step 6: Final answer
    x = 108,788.79

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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.