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Finding the Fourth Proportional to 80,640.79, 120,885.63 and 27,295.43

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Solution

The fourth proportional to 80,640.79, 120,885.63 and 27,295.43 is: 40,917.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,640.79 : 120,885.63 = 27,295.43 : x
  2. Step 2: Convert to fraction form
    80,640.79/120,885.63 = 27,295.43/x
  3. Step 3: Cross multiply
    80,640.79x = 120,885.63 × 27,295.43
  4. Step 4: Simplify right side
    80,640.79x = 3,299,625,575.82
  5. Step 5: Solve for x
    x = 3,299,625,575.82/80,640.79
  6. Step 6: Final answer
    x = 40,917.58

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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.