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Finding the Fourth Proportional to 203,805.72, 305,728.02 and 79,156.44

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Solution

The fourth proportional to 203,805.72, 305,728.02 and 79,156.44 is: 118,742.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,805.72 : 305,728.02 = 79,156.44 : x
  2. Step 2: Convert to fraction form
    203,805.72/305,728.02 = 79,156.44/x
  3. Step 3: Cross multiply
    203,805.72x = 305,728.02 × 79,156.44
  4. Step 4: Simplify right side
    203,805.72x = 24,200,341,671.45
  5. Step 5: Solve for x
    x = 24,200,341,671.45/203,805.72
  6. Step 6: Final answer
    x = 118,742.21

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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.