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Finding the Fourth Proportional to 203,905.50, 305,858.25 and 56,161.50

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Solution

The fourth proportional to 203,905.50, 305,858.25 and 56,161.50 is: 84,242.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,905.50 : 305,858.25 = 56,161.50 : x
  2. Step 2: Convert to fraction form
    203,905.50/305,858.25 = 56,161.50/x
  3. Step 3: Cross multiply
    203,905.50x = 305,858.25 × 56,161.50
  4. Step 4: Simplify right side
    203,905.50x = 17,177,458,107.38
  5. Step 5: Solve for x
    x = 17,177,458,107.38/203,905.50
  6. Step 6: Final answer
    x = 84,242.25

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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.