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Finding the Fourth Proportional to 203,423.10, 305,129.85 and 55,679.10

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Solution

The fourth proportional to 203,423.10, 305,129.85 and 55,679.10 is: 83,517.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,423.10 : 305,129.85 = 55,679.10 : x
  2. Step 2: Convert to fraction form
    203,423.10/305,129.85 = 55,679.10/x
  3. Step 3: Cross multiply
    203,423.10x = 305,129.85 × 55,679.10
  4. Step 4: Simplify right side
    203,423.10x = 16,989,355,431.14
  5. Step 5: Solve for x
    x = 16,989,355,431.14/203,423.10
  6. Step 6: Final answer
    x = 83,517.34

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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.