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Finding the Fourth Proportional to 111,912.20, 167,868.30 and 38,040.20

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Solution

The fourth proportional to 111,912.20, 167,868.30 and 38,040.20 is: 57,060.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,912.20 : 167,868.30 = 38,040.20 : x
  2. Step 2: Convert to fraction form
    111,912.20/167,868.30 = 38,040.20/x
  3. Step 3: Cross multiply
    111,912.20x = 167,868.30 × 38,040.20
  4. Step 4: Simplify right side
    111,912.20x = 6,385,743,705.66
  5. Step 5: Solve for x
    x = 6,385,743,705.66/111,912.20
  6. Step 6: Final answer
    x = 57,060.30

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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.