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Finding the Fourth Proportional to 208,709.05, 288,019.22 and 113,216.42

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Solution

The fourth proportional to 208,709.05, 288,019.22 and 113,216.42 is: 156,239.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,709.05 : 288,019.22 = 113,216.42 : x
  2. Step 2: Convert to fraction form
    208,709.05/288,019.22 = 113,216.42/x
  3. Step 3: Cross multiply
    208,709.05x = 288,019.22 × 113,216.42
  4. Step 4: Simplify right side
    208,709.05x = 32,608,505,133.56
  5. Step 5: Solve for x
    x = 32,608,505,133.56/208,709.05
  6. Step 6: Final answer
    x = 156,239.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.