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Finding the Fourth Proportional to 80,640.63, 111,286.49 and 44,340.20

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Solution

The fourth proportional to 80,640.63, 111,286.49 and 44,340.20 is: 61,190.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,640.63 : 111,286.49 = 44,340.20 : x
  2. Step 2: Convert to fraction form
    80,640.63/111,286.49 = 44,340.20/x
  3. Step 3: Cross multiply
    80,640.63x = 111,286.49 × 44,340.20
  4. Step 4: Simplify right side
    80,640.63x = 4,934,464,445.76
  5. Step 5: Solve for x
    x = 4,934,464,445.76/80,640.63
  6. Step 6: Final answer
    x = 61,190.80

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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.