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Finding the Fourth Proportional to 203,807.70, 305,725.05 and 54,045.90

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Solution

The fourth proportional to 203,807.70, 305,725.05 and 54,045.90 is: 81,072.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,807.70 : 305,725.05 = 54,045.90 : x
  2. Step 2: Convert to fraction form
    203,807.70/305,725.05 = 54,045.90/x
  3. Step 3: Cross multiply
    203,807.70x = 305,725.05 × 54,045.90
  4. Step 4: Simplify right side
    203,807.70x = 16,523,185,479.80
  5. Step 5: Solve for x
    x = 16,523,185,479.80/203,807.70
  6. Step 6: Final answer
    x = 81,072.43

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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.