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Finding the Fourth Proportional to 135,866.72, 203,799.88 and 89,108.64

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Solution

The fourth proportional to 135,866.72, 203,799.88 and 89,108.64 is: 133,662.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,866.72 : 203,799.88 = 89,108.64 : x
  2. Step 2: Convert to fraction form
    135,866.72/203,799.88 = 89,108.64/x
  3. Step 3: Cross multiply
    135,866.72x = 203,799.88 × 89,108.64
  4. Step 4: Simplify right side
    135,866.72x = 18,160,330,138.96
  5. Step 5: Solve for x
    x = 18,160,330,138.96/135,866.72
  6. Step 6: Final answer
    x = 133,662.83

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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.