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Finding the Fourth Proportional to 135,722.85, 203,485.86 and 91,239.27

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Solution

The fourth proportional to 135,722.85, 203,485.86 and 91,239.27 is: 136,792.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,722.85 : 203,485.86 = 91,239.27 : x
  2. Step 2: Convert to fraction form
    135,722.85/203,485.86 = 91,239.27/x
  3. Step 3: Cross multiply
    135,722.85x = 203,485.86 × 91,239.27
  4. Step 4: Simplify right side
    135,722.85x = 18,565,901,321.72
  5. Step 5: Solve for x
    x = 18,565,901,321.72/135,722.85
  6. Step 6: Final answer
    x = 136,792.75

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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.