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Finding the Fourth Proportional to 111,234.60, 166,851.90 and 66,911.40

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Solution

The fourth proportional to 111,234.60, 166,851.90 and 66,911.40 is: 100,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,234.60 : 166,851.90 = 66,911.40 : x
  2. Step 2: Convert to fraction form
    111,234.60/166,851.90 = 66,911.40/x
  3. Step 3: Cross multiply
    111,234.60x = 166,851.90 × 66,911.40
  4. Step 4: Simplify right side
    111,234.60x = 11,164,294,221.66
  5. Step 5: Solve for x
    x = 11,164,294,221.66/111,234.60
  6. Step 6: Final answer
    x = 100,367.10

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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.