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Finding the Fourth Proportional to 135,708.60, 203,757.30 and 76,659.60

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Solution

The fourth proportional to 135,708.60, 203,757.30 and 76,659.60 is: 115,099.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,708.60 : 203,757.30 = 76,659.60 : x
  2. Step 2: Convert to fraction form
    135,708.60/203,757.30 = 76,659.60/x
  3. Step 3: Cross multiply
    135,708.60x = 203,757.30 × 76,659.60
  4. Step 4: Simplify right side
    135,708.60x = 15,619,953,115.08
  5. Step 5: Solve for x
    x = 15,619,953,115.08/135,708.60
  6. Step 6: Final answer
    x = 115,099.21

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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.