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Finding the Fourth Proportional to 72,321.09, 108,463.90 and 30,201.49

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Solution

The fourth proportional to 72,321.09, 108,463.90 and 30,201.49 is: 45,294.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,321.09 : 108,463.90 = 30,201.49 : x
  2. Step 2: Convert to fraction form
    72,321.09/108,463.90 = 30,201.49/x
  3. Step 3: Cross multiply
    72,321.09x = 108,463.90 × 30,201.49
  4. Step 4: Simplify right side
    72,321.09x = 3,275,771,391.21
  5. Step 5: Solve for x
    x = 3,275,771,391.21/72,321.09
  6. Step 6: Final answer
    x = 45,294.83

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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.