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Finding the Fourth Proportional to 381,383.92, 572,168.37 and 115,128.53

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Solution

The fourth proportional to 381,383.92, 572,168.37 and 115,128.53 is: 172,720.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,383.92 : 572,168.37 = 115,128.53 : x
  2. Step 2: Convert to fraction form
    381,383.92/572,168.37 = 115,128.53/x
  3. Step 3: Cross multiply
    381,383.92x = 572,168.37 × 115,128.53
  4. Step 4: Simplify right side
    381,383.92x = 65,872,903,350.60
  5. Step 5: Solve for x
    x = 65,872,903,350.60/381,383.92
  6. Step 6: Final answer
    x = 172,720.71

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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.