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Finding the Fourth Proportional to 203,910.88, 305,931.32 and 85,550.44

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Solution

The fourth proportional to 203,910.88, 305,931.32 and 85,550.44 is: 128,352.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,910.88 : 305,931.32 = 85,550.44 : x
  2. Step 2: Convert to fraction form
    203,910.88/305,931.32 = 85,550.44/x
  3. Step 3: Cross multiply
    203,910.88x = 305,931.32 × 85,550.44
  4. Step 4: Simplify right side
    203,910.88x = 26,172,559,035.78
  5. Step 5: Solve for x
    x = 26,172,559,035.78/203,910.88
  6. Step 6: Final answer
    x = 128,352.93

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1.5x scale

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.