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Finding the Fourth Proportional to 208,710.05, 288,020.60 and 113,217.42

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Solution

The fourth proportional to 208,710.05, 288,020.60 and 113,217.42 is: 156,240.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,710.05 : 288,020.60 = 113,217.42 : x
  2. Step 2: Convert to fraction form
    208,710.05/288,020.60 = 113,217.42/x
  3. Step 3: Cross multiply
    208,710.05x = 288,020.60 × 113,217.42
  4. Step 4: Simplify right side
    208,710.05x = 32,608,949,238.85
  5. Step 5: Solve for x
    x = 32,608,949,238.85/208,710.05
  6. Step 6: Final answer
    x = 156,240.44

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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.