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Finding the Fourth Proportional to 189,939.44, 284,974.68 and 71,644.64

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Solution

The fourth proportional to 189,939.44, 284,974.68 and 71,644.64 is: 107,491.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,939.44 : 284,974.68 = 71,644.64 : x
  2. Step 2: Convert to fraction form
    189,939.44/284,974.68 = 71,644.64/x
  3. Step 3: Cross multiply
    189,939.44x = 284,974.68 × 71,644.64
  4. Step 4: Simplify right side
    189,939.44x = 20,416,908,357.72
  5. Step 5: Solve for x
    x = 20,416,908,357.72/189,939.44
  6. Step 6: Final answer
    x = 107,491.67

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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.