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Finding the Fourth Proportional to 50,879.32, 70,213.98 and 28,218.66

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Solution

The fourth proportional to 50,879.32, 70,213.98 and 28,218.66 is: 38,942.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,879.32 : 70,213.98 = 28,218.66 : x
  2. Step 2: Convert to fraction form
    50,879.32/70,213.98 = 28,218.66/x
  3. Step 3: Cross multiply
    50,879.32x = 70,213.98 × 28,218.66
  4. Step 4: Simplify right side
    50,879.32x = 1,981,344,428.87
  5. Step 5: Solve for x
    x = 1,981,344,428.87/50,879.32
  6. Step 6: Final answer
    x = 38,942.04

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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.