Home / 80,269.21-120,404.72-21,110.86

Finding the Fourth Proportional to 80,269.21, 120,404.72 and 21,110.86

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Solution

The fourth proportional to 80,269.21, 120,404.72 and 21,110.86 is: 31,666.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,269.21 : 120,404.72 = 21,110.86 : x
  2. Step 2: Convert to fraction form
    80,269.21/120,404.72 = 21,110.86/x
  3. Step 3: Cross multiply
    80,269.21x = 120,404.72 × 21,110.86
  4. Step 4: Simplify right side
    80,269.21x = 2,541,846,479.68
  5. Step 5: Solve for x
    x = 2,541,846,479.68/80,269.21
  6. Step 6: Final answer
    x = 31,666.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.