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Finding the Fourth Proportional to 120,791.40, 166,686.60 and 67,079.80

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Solution

The fourth proportional to 120,791.40, 166,686.60 and 67,079.80 is: 92,567.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,791.40 : 166,686.60 = 67,079.80 : x
  2. Step 2: Convert to fraction form
    120,791.40/166,686.60 = 67,079.80/x
  3. Step 3: Cross multiply
    120,791.40x = 166,686.60 × 67,079.80
  4. Step 4: Simplify right side
    120,791.40x = 11,181,303,790.68
  5. Step 5: Solve for x
    x = 11,181,303,790.68/120,791.40
  6. Step 6: Final answer
    x = 92,567.05

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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.