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Finding the Fourth Proportional to 72,629.77, 108,950.94 and 20,039.26

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Solution

The fourth proportional to 72,629.77, 108,950.94 and 20,039.26 is: 30,060.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,629.77 : 108,950.94 = 20,039.26 : x
  2. Step 2: Convert to fraction form
    72,629.77/108,950.94 = 20,039.26/x
  3. Step 3: Cross multiply
    72,629.77x = 108,950.94 × 20,039.26
  4. Step 4: Simplify right side
    72,629.77x = 2,183,296,213.90
  5. Step 5: Solve for x
    x = 2,183,296,213.90/72,629.77
  6. Step 6: Final answer
    x = 30,060.62

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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.