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Finding the Fourth Proportional to 119,651.78, 165,120.12 and 68,660.46

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Solution

The fourth proportional to 119,651.78, 165,120.12 and 68,660.46 is: 94,751.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,651.78 : 165,120.12 = 68,660.46 : x
  2. Step 2: Convert to fraction form
    119,651.78/165,120.12 = 68,660.46/x
  3. Step 3: Cross multiply
    119,651.78x = 165,120.12 × 68,660.46
  4. Step 4: Simplify right side
    119,651.78x = 11,337,223,394.46
  5. Step 5: Solve for x
    x = 11,337,223,394.46/119,651.78
  6. Step 6: Final answer
    x = 94,751.81

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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.