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Finding the Fourth Proportional to 80,418.69, 110,905.13 and 50,206.77

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Solution

The fourth proportional to 80,418.69, 110,905.13 and 50,206.77 is: 69,239.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,418.69 : 110,905.13 = 50,206.77 : x
  2. Step 2: Convert to fraction form
    80,418.69/110,905.13 = 50,206.77/x
  3. Step 3: Cross multiply
    80,418.69x = 110,905.13 × 50,206.77
  4. Step 4: Simplify right side
    80,418.69x = 5,568,188,479.25
  5. Step 5: Solve for x
    x = 5,568,188,479.25/80,418.69
  6. Step 6: Final answer
    x = 69,239.98

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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.