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Finding the Fourth Proportional to 203,671.60, 305,384.68 and 91,331.49

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Solution

The fourth proportional to 203,671.60, 305,384.68 and 91,331.49 is: 136,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,671.60 : 305,384.68 = 91,331.49 : x
  2. Step 2: Convert to fraction form
    203,671.60/305,384.68 = 91,331.49/x
  3. Step 3: Cross multiply
    203,671.60x = 305,384.68 × 91,331.49
  4. Step 4: Simplify right side
    203,671.60x = 27,891,237,847.57
  5. Step 5: Solve for x
    x = 27,891,237,847.57/203,671.60
  6. Step 6: Final answer
    x = 136,942.20

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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.