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Finding the Fourth Proportional to 139,231.70, 208,847.55 and 100,157.30

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Solution

The fourth proportional to 139,231.70, 208,847.55 and 100,157.30 is: 150,235.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,231.70 : 208,847.55 = 100,157.30 : x
  2. Step 2: Convert to fraction form
    139,231.70/208,847.55 = 100,157.30/x
  3. Step 3: Cross multiply
    139,231.70x = 208,847.55 × 100,157.30
  4. Step 4: Simplify right side
    139,231.70x = 20,917,606,719.62
  5. Step 5: Solve for x
    x = 20,917,606,719.62/139,231.70
  6. Step 6: Final answer
    x = 150,235.95

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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.