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Finding the Fourth Proportional to 203,155.75, 280,261.89 and 131,558.86

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Solution

The fourth proportional to 203,155.75, 280,261.89 and 131,558.86 is: 181,490.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,155.75 : 280,261.89 = 131,558.86 : x
  2. Step 2: Convert to fraction form
    203,155.75/280,261.89 = 131,558.86/x
  3. Step 3: Cross multiply
    203,155.75x = 280,261.89 × 131,558.86
  4. Step 4: Simplify right side
    203,155.75x = 36,870,934,749.85
  5. Step 5: Solve for x
    x = 36,870,934,749.85/203,155.75
  6. Step 6: Final answer
    x = 181,490.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.