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Finding the Fourth Proportional to 135,902.70, 203,854.05 and 130,143.60

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Solution

The fourth proportional to 135,902.70, 203,854.05 and 130,143.60 is: 195,215.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,902.70 : 203,854.05 = 130,143.60 : x
  2. Step 2: Convert to fraction form
    135,902.70/203,854.05 = 130,143.60/x
  3. Step 3: Cross multiply
    135,902.70x = 203,854.05 × 130,143.60
  4. Step 4: Simplify right side
    135,902.70x = 26,530,299,941.58
  5. Step 5: Solve for x
    x = 26,530,299,941.58/135,902.70
  6. Step 6: Final answer
    x = 195,215.40

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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.