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Finding the Fourth Proportional to 135,951.40, 203,727.90 and 121,911.40

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Solution

The fourth proportional to 135,951.40, 203,727.90 and 121,911.40 is: 182,688.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,951.40 : 203,727.90 = 121,911.40 : x
  2. Step 2: Convert to fraction form
    135,951.40/203,727.90 = 121,911.40/x
  3. Step 3: Cross multiply
    135,951.40x = 203,727.90 × 121,911.40
  4. Step 4: Simplify right side
    135,951.40x = 24,836,753,508.06
  5. Step 5: Solve for x
    x = 24,836,753,508.06/135,951.40
  6. Step 6: Final answer
    x = 182,688.47

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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.