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Finding the Fourth Proportional to 203,634.38, 305,328.81 and 91,294.28

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Solution

The fourth proportional to 203,634.38, 305,328.81 and 91,294.28 is: 136,886.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,634.38 : 305,328.81 = 91,294.28 : x
  2. Step 2: Convert to fraction form
    203,634.38/305,328.81 = 91,294.28/x
  3. Step 3: Cross multiply
    203,634.38x = 305,328.81 × 91,294.28
  4. Step 4: Simplify right side
    203,634.38x = 27,874,773,872.21
  5. Step 5: Solve for x
    x = 27,874,773,872.21/203,634.38
  6. Step 6: Final answer
    x = 136,886.38

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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.