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Finding the Fourth Proportional to 203,633.88, 305,328.06 and 91,293.78

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Solution

The fourth proportional to 203,633.88, 305,328.06 and 91,293.78 is: 136,885.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,633.88 : 305,328.06 = 91,293.78 : x
  2. Step 2: Convert to fraction form
    203,633.88/305,328.06 = 91,293.78/x
  3. Step 3: Cross multiply
    203,633.88x = 305,328.06 × 91,293.78
  4. Step 4: Simplify right side
    203,633.88x = 27,874,552,737.47
  5. Step 5: Solve for x
    x = 27,874,552,737.47/203,633.88
  6. Step 6: Final answer
    x = 136,885.63

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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.