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Finding the Fourth Proportional to 203,768.20, 305,665.80 and 54,006.40

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Solution

The fourth proportional to 203,768.20, 305,665.80 and 54,006.40 is: 81,013.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,768.20 : 305,665.80 = 54,006.40 : x
  2. Step 2: Convert to fraction form
    203,768.20/305,665.80 = 54,006.40/x
  3. Step 3: Cross multiply
    203,768.20x = 305,665.80 × 54,006.40
  4. Step 4: Simplify right side
    203,768.20x = 16,507,909,461.12
  5. Step 5: Solve for x
    x = 16,507,909,461.12/203,768.20
  6. Step 6: Final answer
    x = 81,013.18

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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.