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Finding the Fourth Proportional to 203,767.20, 305,664.30 and 54,005.40

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Solution

The fourth proportional to 203,767.20, 305,664.30 and 54,005.40 is: 81,011.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,767.20 : 305,664.30 = 54,005.40 : x
  2. Step 2: Convert to fraction form
    203,767.20/305,664.30 = 54,005.40/x
  3. Step 3: Cross multiply
    203,767.20x = 305,664.30 × 54,005.40
  4. Step 4: Simplify right side
    203,767.20x = 16,507,522,787.22
  5. Step 5: Solve for x
    x = 16,507,522,787.22/203,767.20
  6. Step 6: Final answer
    x = 81,011.68

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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.