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Finding the Fourth Proportional to 166,791.63, 230,172.11 and 90,310.80

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Solution

The fourth proportional to 166,791.63, 230,172.11 and 90,310.80 is: 124,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,791.63 : 230,172.11 = 90,310.80 : x
  2. Step 2: Convert to fraction form
    166,791.63/230,172.11 = 90,310.80/x
  3. Step 3: Cross multiply
    166,791.63x = 230,172.11 × 90,310.80
  4. Step 4: Simplify right side
    166,791.63x = 20,787,027,391.79
  5. Step 5: Solve for x
    x = 20,787,027,391.79/166,791.63
  6. Step 6: Final answer
    x = 124,628.72

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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.