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Finding the Fourth Proportional to 50,879.88, 70,212.42 and 28,219.86

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Solution

The fourth proportional to 50,879.88, 70,212.42 and 28,219.86 is: 38,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,879.88 : 70,212.42 = 28,219.86 : x
  2. Step 2: Convert to fraction form
    50,879.88/70,212.42 = 28,219.86/x
  3. Step 3: Cross multiply
    50,879.88x = 70,212.42 × 28,219.86
  4. Step 4: Simplify right side
    50,879.88x = 1,981,384,662.66
  5. Step 5: Solve for x
    x = 1,981,384,662.66/50,879.88
  6. Step 6: Final answer
    x = 38,942.40

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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.