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Finding the Fourth Proportional to 119,791.60, 165,313.56 and 66,078.88

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Solution

The fourth proportional to 119,791.60, 165,313.56 and 66,078.88 is: 91,189.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,791.60 : 165,313.56 = 66,078.88 : x
  2. Step 2: Convert to fraction form
    119,791.60/165,313.56 = 66,078.88/x
  3. Step 3: Cross multiply
    119,791.60x = 165,313.56 × 66,078.88
  4. Step 4: Simplify right side
    119,791.60x = 10,923,734,893.61
  5. Step 5: Solve for x
    x = 10,923,734,893.61/119,791.60
  6. Step 6: Final answer
    x = 91,189.49

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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.