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Finding the Fourth Proportional to 120,728.52, 166,608 and 67,012.74

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Solution

The fourth proportional to 120,728.52, 166,608 and 67,012.74 is: 92,479.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,728.52 : 166,608 = 67,012.74 : x
  2. Step 2: Convert to fraction form
    120,728.52/166,608 = 67,012.74/x
  3. Step 3: Cross multiply
    120,728.52x = 166,608 × 67,012.74
  4. Step 4: Simplify right side
    120,728.52x = 11,164,858,585.92
  5. Step 5: Solve for x
    x = 11,164,858,585.92/120,728.52
  6. Step 6: Final answer
    x = 92,479.05

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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.