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Finding the Fourth Proportional to 71,203.38, 106,735.20 and 39,628.56

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Solution

The fourth proportional to 71,203.38, 106,735.20 and 39,628.56 is: 59,403.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,203.38 : 106,735.20 = 39,628.56 : x
  2. Step 2: Convert to fraction form
    71,203.38/106,735.20 = 39,628.56/x
  3. Step 3: Cross multiply
    71,203.38x = 106,735.20 × 39,628.56
  4. Step 4: Simplify right side
    71,203.38x = 4,229,762,544.15
  5. Step 5: Solve for x
    x = 4,229,762,544.15/71,203.38
  6. Step 6: Final answer
    x = 59,403.96

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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.