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Finding the Fourth Proportional to 72,645.72, 108,960.38 and 20,062.68

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Solution

The fourth proportional to 72,645.72, 108,960.38 and 20,062.68 is: 30,091.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,645.72 : 108,960.38 = 20,062.68 : x
  2. Step 2: Convert to fraction form
    72,645.72/108,960.38 = 20,062.68/x
  3. Step 3: Cross multiply
    72,645.72x = 108,960.38 × 20,062.68
  4. Step 4: Simplify right side
    72,645.72x = 2,186,037,236.62
  5. Step 5: Solve for x
    x = 2,186,037,236.62/72,645.72
  6. Step 6: Final answer
    x = 30,091.76

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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.