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Finding the Fourth Proportional to 71,009.82, 106,529.30 and 28,889.79

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Solution

The fourth proportional to 71,009.82, 106,529.30 and 28,889.79 is: 43,340.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,009.82 : 106,529.30 = 28,889.79 : x
  2. Step 2: Convert to fraction form
    71,009.82/106,529.30 = 28,889.79/x
  3. Step 3: Cross multiply
    71,009.82x = 106,529.30 × 28,889.79
  4. Step 4: Simplify right side
    71,009.82x = 3,077,609,105.85
  5. Step 5: Solve for x
    x = 3,077,609,105.85/71,009.82
  6. Step 6: Final answer
    x = 43,340.61

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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.