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Finding the Fourth Proportional to 66,957.28, 100,474.86 and 30,021.28

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Solution

The fourth proportional to 66,957.28, 100,474.86 and 30,021.28 is: 45,049.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,957.28 : 100,474.86 = 30,021.28 : x
  2. Step 2: Convert to fraction form
    66,957.28/100,474.86 = 30,021.28/x
  3. Step 3: Cross multiply
    66,957.28x = 100,474.86 × 30,021.28
  4. Step 4: Simplify right side
    66,957.28x = 3,016,383,905.02
  5. Step 5: Solve for x
    x = 3,016,383,905.02/66,957.28
  6. Step 6: Final answer
    x = 45,049.38

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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.