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Finding the Fourth Proportional to 203,917.20, 305,875.80 and 133,058.40

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Solution

The fourth proportional to 203,917.20, 305,875.80 and 133,058.40 is: 199,587.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,917.20 : 305,875.80 = 133,058.40 : x
  2. Step 2: Convert to fraction form
    203,917.20/305,875.80 = 133,058.40/x
  3. Step 3: Cross multiply
    203,917.20x = 305,875.80 × 133,058.40
  4. Step 4: Simplify right side
    203,917.20x = 40,699,344,546.72
  5. Step 5: Solve for x
    x = 40,699,344,546.72/203,917.20
  6. Step 6: Final answer
    x = 199,587.60

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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.