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Finding the Fourth Proportional to 71,731.45, 107,472.47 and 50,338.79

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Solution

The fourth proportional to 71,731.45, 107,472.47 and 50,338.79 is: 75,420.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,731.45 : 107,472.47 = 50,338.79 : x
  2. Step 2: Convert to fraction form
    71,731.45/107,472.47 = 50,338.79/x
  3. Step 3: Cross multiply
    71,731.45x = 107,472.47 × 50,338.79
  4. Step 4: Simplify right side
    71,731.45x = 5,410,034,098.11
  5. Step 5: Solve for x
    x = 5,410,034,098.11/71,731.45
  6. Step 6: Final answer
    x = 75,420.67

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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.