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Finding the Fourth Proportional to 203,516.81, 305,321.72 and 70,396.96

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Solution

The fourth proportional to 203,516.81, 305,321.72 and 70,396.96 is: 105,611.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,516.81 : 305,321.72 = 70,396.96 : x
  2. Step 2: Convert to fraction form
    203,516.81/305,321.72 = 70,396.96/x
  3. Step 3: Cross multiply
    203,516.81x = 305,321.72 × 70,396.96
  4. Step 4: Simplify right side
    203,516.81x = 21,493,720,909.97
  5. Step 5: Solve for x
    x = 21,493,720,909.97/203,516.81
  6. Step 6: Final answer
    x = 105,611.53

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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.