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Finding the Fourth Proportional to 80,993.72, 121,490.07 and 27,659.97

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Solution

The fourth proportional to 80,993.72, 121,490.07 and 27,659.97 is: 41,489.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,993.72 : 121,490.07 = 27,659.97 : x
  2. Step 2: Convert to fraction form
    80,993.72/121,490.07 = 27,659.97/x
  3. Step 3: Cross multiply
    80,993.72x = 121,490.07 × 27,659.97
  4. Step 4: Simplify right side
    80,993.72x = 3,360,411,184.05
  5. Step 5: Solve for x
    x = 3,360,411,184.05/80,993.72
  6. Step 6: Final answer
    x = 41,489.77

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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.