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Finding the Fourth Proportional to 203,885.55, 305,872.10 and 79,226.55

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Solution

The fourth proportional to 203,885.55, 305,872.10 and 79,226.55 is: 118,856.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,885.55 : 305,872.10 = 79,226.55 : x
  2. Step 2: Convert to fraction form
    203,885.55/305,872.10 = 79,226.55/x
  3. Step 3: Cross multiply
    203,885.55x = 305,872.10 × 79,226.55
  4. Step 4: Simplify right side
    203,885.55x = 24,233,190,828.12
  5. Step 5: Solve for x
    x = 24,233,190,828.12/203,885.55
  6. Step 6: Final answer
    x = 118,856.83

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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.