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Finding the Fourth Proportional to 203,917.20, 305,875.80 and 54,180.60

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Solution

The fourth proportional to 203,917.20, 305,875.80 and 54,180.60 is: 81,270.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,917.20 : 305,875.80 = 54,180.60 : x
  2. Step 2: Convert to fraction form
    203,917.20/305,875.80 = 54,180.60/x
  3. Step 3: Cross multiply
    203,917.20x = 305,875.80 × 54,180.60
  4. Step 4: Simplify right side
    203,917.20x = 16,572,534,369.48
  5. Step 5: Solve for x
    x = 16,572,534,369.48/203,917.20
  6. Step 6: Final answer
    x = 81,270.90

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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.