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Finding the Fourth Proportional to 239,640.39, 359,398.94 and 71,120.79

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Solution

The fourth proportional to 239,640.39, 359,398.94 and 71,120.79 is: 106,662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,640.39 : 359,398.94 = 71,120.79 : x
  2. Step 2: Convert to fraction form
    239,640.39/359,398.94 = 71,120.79/x
  3. Step 3: Cross multiply
    239,640.39x = 359,398.94 × 71,120.79
  4. Step 4: Simplify right side
    239,640.39x = 25,560,736,182.36
  5. Step 5: Solve for x
    x = 25,560,736,182.36/239,640.39
  6. Step 6: Final answer
    x = 106,662.89

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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.