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Finding the Fourth Proportional to 203,641.38, 305,339.31 and 91,301.28

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Solution

The fourth proportional to 203,641.38, 305,339.31 and 91,301.28 is: 136,896.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,641.38 : 305,339.31 = 91,301.28 : x
  2. Step 2: Convert to fraction form
    203,641.38/305,339.31 = 91,301.28/x
  3. Step 3: Cross multiply
    203,641.38x = 305,339.31 × 91,301.28
  4. Step 4: Simplify right side
    203,641.38x = 27,877,869,837.32
  5. Step 5: Solve for x
    x = 27,877,869,837.32/203,641.38
  6. Step 6: Final answer
    x = 136,896.88

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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.