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Finding the Fourth Proportional to 135,505.83, 203,383.68 and 68,993.89

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Solution

The fourth proportional to 135,505.83, 203,383.68 and 68,993.89 is: 103,554.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,505.83 : 203,383.68 = 68,993.89 : x
  2. Step 2: Convert to fraction form
    135,505.83/203,383.68 = 68,993.89/x
  3. Step 3: Cross multiply
    135,505.83x = 203,383.68 × 68,993.89
  4. Step 4: Simplify right side
    135,505.83x = 14,032,231,245.72
  5. Step 5: Solve for x
    x = 14,032,231,245.72/135,505.83
  6. Step 6: Final answer
    x = 103,554.45

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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.