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Finding the Fourth Proportional to 72,974.46, 100,704.87 and 39,440.46

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Solution

The fourth proportional to 72,974.46, 100,704.87 and 39,440.46 is: 54,427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,974.46 : 100,704.87 = 39,440.46 : x
  2. Step 2: Convert to fraction form
    72,974.46/100,704.87 = 39,440.46/x
  3. Step 3: Cross multiply
    72,974.46x = 100,704.87 × 39,440.46
  4. Step 4: Simplify right side
    72,974.46x = 3,971,846,397.04
  5. Step 5: Solve for x
    x = 3,971,846,397.04/72,974.46
  6. Step 6: Final answer
    x = 54,427.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.