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Finding the Fourth Proportional to 111,425.87, 153,769.79 and 68,383.79

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Solution

The fourth proportional to 111,425.87, 153,769.79 and 68,383.79 is: 94,370.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,425.87 : 153,769.79 = 68,383.79 : x
  2. Step 2: Convert to fraction form
    111,425.87/153,769.79 = 68,383.79/x
  3. Step 3: Cross multiply
    111,425.87x = 153,769.79 × 68,383.79
  4. Step 4: Simplify right side
    111,425.87x = 10,515,361,027.70
  5. Step 5: Solve for x
    x = 10,515,361,027.70/111,425.87
  6. Step 6: Final answer
    x = 94,370.91

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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.