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Finding the Fourth Proportional to 119,640.75, 165,093.90 and 65,912.54

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Solution

The fourth proportional to 119,640.75, 165,093.90 and 65,912.54 is: 90,953.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,640.75 : 165,093.90 = 65,912.54 : x
  2. Step 2: Convert to fraction form
    119,640.75/165,093.90 = 65,912.54/x
  3. Step 3: Cross multiply
    119,640.75x = 165,093.90 × 65,912.54
  4. Step 4: Simplify right side
    119,640.75x = 10,881,757,214.86
  5. Step 5: Solve for x
    x = 10,881,757,214.86/119,640.75
  6. Step 6: Final answer
    x = 90,953.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.