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Finding the Fourth Proportional to 203,635.56, 305,380.14 and 70,479.72

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Solution

The fourth proportional to 203,635.56, 305,380.14 and 70,479.72 is: 105,694.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,635.56 : 305,380.14 = 70,479.72 : x
  2. Step 2: Convert to fraction form
    203,635.56/305,380.14 = 70,479.72/x
  3. Step 3: Cross multiply
    203,635.56x = 305,380.14 × 70,479.72
  4. Step 4: Simplify right side
    203,635.56x = 21,523,106,760.76
  5. Step 5: Solve for x
    x = 21,523,106,760.76/203,635.56
  6. Step 6: Final answer
    x = 105,694.24

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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.