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Finding the Fourth Proportional to 49,720.92, 74,601.90 and 20,131.22

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Solution

The fourth proportional to 49,720.92, 74,601.90 and 20,131.22 is: 30,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,720.92 : 74,601.90 = 20,131.22 : x
  2. Step 2: Convert to fraction form
    49,720.92/74,601.90 = 20,131.22/x
  3. Step 3: Cross multiply
    49,720.92x = 74,601.90 × 20,131.22
  4. Step 4: Simplify right side
    49,720.92x = 1,501,826,888.31
  5. Step 5: Solve for x
    x = 1,501,826,888.31/49,720.92
  6. Step 6: Final answer
    x = 30,205.13

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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.