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Finding the Fourth Proportional to 72,169.09, 108,251.21 and 25,420.75

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Solution

The fourth proportional to 72,169.09, 108,251.21 and 25,420.75 is: 38,130.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,169.09 : 108,251.21 = 25,420.75 : x
  2. Step 2: Convert to fraction form
    72,169.09/108,251.21 = 25,420.75/x
  3. Step 3: Cross multiply
    72,169.09x = 108,251.21 × 25,420.75
  4. Step 4: Simplify right side
    72,169.09x = 2,751,826,819.50
  5. Step 5: Solve for x
    x = 2,751,826,819.50/72,169.09
  6. Step 6: Final answer
    x = 38,130.27

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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.