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Finding the Fourth Proportional to 135,893.78, 203,865.16 and 55,917.62

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Solution

The fourth proportional to 135,893.78, 203,865.16 and 55,917.62 is: 83,886.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,893.78 : 203,865.16 = 55,917.62 : x
  2. Step 2: Convert to fraction form
    135,893.78/203,865.16 = 55,917.62/x
  3. Step 3: Cross multiply
    135,893.78x = 203,865.16 × 55,917.62
  4. Step 4: Simplify right side
    135,893.78x = 11,399,654,548.12
  5. Step 5: Solve for x
    x = 11,399,654,548.12/135,893.78
  6. Step 6: Final answer
    x = 83,886.51

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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.