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Finding the Fourth Proportional to 203,896.05, 305,887.85 and 79,237.05

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Solution

The fourth proportional to 203,896.05, 305,887.85 and 79,237.05 is: 118,872.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,896.05 : 305,887.85 = 79,237.05 : x
  2. Step 2: Convert to fraction form
    203,896.05/305,887.85 = 79,237.05/x
  3. Step 3: Cross multiply
    203,896.05x = 305,887.85 × 79,237.05
  4. Step 4: Simplify right side
    203,896.05x = 24,237,650,468.66
  5. Step 5: Solve for x
    x = 24,237,650,468.66/203,896.05
  6. Step 6: Final answer
    x = 118,872.58

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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.