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Finding the Fourth Proportional to 203,479.70, 305,157.11 and 140,703.21

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Solution

The fourth proportional to 203,479.70, 305,157.11 and 140,703.21 is: 211,011.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,479.70 : 305,157.11 = 140,703.21 : x
  2. Step 2: Convert to fraction form
    203,479.70/305,157.11 = 140,703.21/x
  3. Step 3: Cross multiply
    203,479.70x = 305,157.11 × 140,703.21
  4. Step 4: Simplify right side
    203,479.70x = 42,936,584,227.81
  5. Step 5: Solve for x
    x = 42,936,584,227.81/203,479.70
  6. Step 6: Final answer
    x = 211,011.64

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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.