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Finding the Fourth Proportional to 72,540.74, 108,786.39 and 25,144.76

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Solution

The fourth proportional to 72,540.74, 108,786.39 and 25,144.76 is: 37,708.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,540.74 : 108,786.39 = 25,144.76 : x
  2. Step 2: Convert to fraction form
    72,540.74/108,786.39 = 25,144.76/x
  3. Step 3: Cross multiply
    72,540.74x = 108,786.39 × 25,144.76
  4. Step 4: Simplify right side
    72,540.74x = 2,735,407,667.82
  5. Step 5: Solve for x
    x = 2,735,407,667.82/72,540.74
  6. Step 6: Final answer
    x = 37,708.57

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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.