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Finding the Fourth Proportional to 135,665.70, 203,498.55 and 129,906.60

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Solution

The fourth proportional to 135,665.70, 203,498.55 and 129,906.60 is: 194,859.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,665.70 : 203,498.55 = 129,906.60 : x
  2. Step 2: Convert to fraction form
    135,665.70/203,498.55 = 129,906.60/x
  3. Step 3: Cross multiply
    135,665.70x = 203,498.55 × 129,906.60
  4. Step 4: Simplify right side
    135,665.70x = 26,435,804,735.43
  5. Step 5: Solve for x
    x = 26,435,804,735.43/135,665.70
  6. Step 6: Final answer
    x = 194,859.90

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1.5x scale

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.