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Finding the Fourth Proportional to 111,274.80, 166,912.20 and 81,531.60

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Solution

The fourth proportional to 111,274.80, 166,912.20 and 81,531.60 is: 122,297.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,274.80 : 166,912.20 = 81,531.60 : x
  2. Step 2: Convert to fraction form
    111,274.80/166,912.20 = 81,531.60/x
  3. Step 3: Cross multiply
    111,274.80x = 166,912.20 × 81,531.60
  4. Step 4: Simplify right side
    111,274.80x = 13,608,618,725.52
  5. Step 5: Solve for x
    x = 13,608,618,725.52/111,274.80
  6. Step 6: Final answer
    x = 122,297.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.