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Finding the Fourth Proportional to 203,376.78, 305,178.30 and 91,052.46

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Solution

The fourth proportional to 203,376.78, 305,178.30 and 91,052.46 is: 136,629.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,376.78 : 305,178.30 = 91,052.46 : x
  2. Step 2: Convert to fraction form
    203,376.78/305,178.30 = 91,052.46/x
  3. Step 3: Cross multiply
    203,376.78x = 305,178.30 × 91,052.46
  4. Step 4: Simplify right side
    203,376.78x = 27,787,234,953.62
  5. Step 5: Solve for x
    x = 27,787,234,953.62/203,376.78
  6. Step 6: Final answer
    x = 136,629.34

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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.