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Finding the Fourth Proportional to 111,640.80, 167,234.40 and 69,391.20

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Solution

The fourth proportional to 111,640.80, 167,234.40 and 69,391.20 is: 103,945.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,640.80 : 167,234.40 = 69,391.20 : x
  2. Step 2: Convert to fraction form
    111,640.80/167,234.40 = 69,391.20/x
  3. Step 3: Cross multiply
    111,640.80x = 167,234.40 × 69,391.20
  4. Step 4: Simplify right side
    111,640.80x = 11,604,595,697.28
  5. Step 5: Solve for x
    x = 11,604,595,697.28/111,640.80
  6. Step 6: Final answer
    x = 103,945.83

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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.