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Finding the Fourth Proportional to 80,993.22, 121,490.91 and 28,404.24

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Solution

The fourth proportional to 80,993.22, 121,490.91 and 28,404.24 is: 42,606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,993.22 : 121,490.91 = 28,404.24 : x
  2. Step 2: Convert to fraction form
    80,993.22/121,490.91 = 28,404.24/x
  3. Step 3: Cross multiply
    80,993.22x = 121,490.91 × 28,404.24
  4. Step 4: Simplify right side
    80,993.22x = 3,450,856,965.46
  5. Step 5: Solve for x
    x = 3,450,856,965.46/80,993.22
  6. Step 6: Final answer
    x = 42,606.74

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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.