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Finding the Fourth Proportional to 71,629.92, 107,446.91 and 19,039.46

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Solution

The fourth proportional to 71,629.92, 107,446.91 and 19,039.46 is: 28,559.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,629.92 : 107,446.91 = 19,039.46 : x
  2. Step 2: Convert to fraction form
    71,629.92/107,446.91 = 19,039.46/x
  3. Step 3: Cross multiply
    71,629.92x = 107,446.91 × 19,039.46
  4. Step 4: Simplify right side
    71,629.92x = 2,045,730,512.64
  5. Step 5: Solve for x
    x = 2,045,730,512.64/71,629.92
  6. Step 6: Final answer
    x = 28,559.72

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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.