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Finding the Fourth Proportional to 80,801.92, 111,520 and 47,261.44

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Solution

The fourth proportional to 80,801.92, 111,520 and 47,261.44 is: 65,228.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,801.92 : 111,520 = 47,261.44 : x
  2. Step 2: Convert to fraction form
    80,801.92/111,520 = 47,261.44/x
  3. Step 3: Cross multiply
    80,801.92x = 111,520 × 47,261.44
  4. Step 4: Simplify right side
    80,801.92x = 5,270,595,788.80
  5. Step 5: Solve for x
    x = 5,270,595,788.80/80,801.92
  6. Step 6: Final answer
    x = 65,228.60

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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.