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Finding the Fourth Proportional to 115,380.78, 159,227.55 and 67,668.54

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Solution

The fourth proportional to 115,380.78, 159,227.55 and 67,668.54 is: 93,383.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,380.78 : 159,227.55 = 67,668.54 : x
  2. Step 2: Convert to fraction form
    115,380.78/159,227.55 = 67,668.54/x
  3. Step 3: Cross multiply
    115,380.78x = 159,227.55 × 67,668.54
  4. Step 4: Simplify right side
    115,380.78x = 10,774,695,836.28
  5. Step 5: Solve for x
    x = 10,774,695,836.28/115,380.78
  6. Step 6: Final answer
    x = 93,383.80

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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.