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Finding the Fourth Proportional to 111,203.80, 166,935.30 and 66,880.60

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Solution

The fourth proportional to 111,203.80, 166,935.30 and 66,880.60 is: 100,398.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,203.80 : 166,935.30 = 66,880.60 : x
  2. Step 2: Convert to fraction form
    111,203.80/166,935.30 = 66,880.60/x
  3. Step 3: Cross multiply
    111,203.80x = 166,935.30 × 66,880.60
  4. Step 4: Simplify right side
    111,203.80x = 11,164,733,025.18
  5. Step 5: Solve for x
    x = 11,164,733,025.18/111,203.80
  6. Step 6: Final answer
    x = 100,398.84

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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.