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Finding the Fourth Proportional to 111,431.80, 167,147.70 and 67,035.70

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Solution

The fourth proportional to 111,431.80, 167,147.70 and 67,035.70 is: 100,553.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,431.80 : 167,147.70 = 67,035.70 : x
  2. Step 2: Convert to fraction form
    111,431.80/167,147.70 = 67,035.70/x
  3. Step 3: Cross multiply
    111,431.80x = 167,147.70 × 67,035.70
  4. Step 4: Simplify right side
    111,431.80x = 11,204,863,072.89
  5. Step 5: Solve for x
    x = 11,204,863,072.89/111,431.80
  6. Step 6: Final answer
    x = 100,553.55

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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.