Home / 80,781.40-111,458.10-48,521.44

Finding the Fourth Proportional to 80,781.40, 111,458.10 and 48,521.44

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Solution

The fourth proportional to 80,781.40, 111,458.10 and 48,521.44 is: 66,947.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,781.40 : 111,458.10 = 48,521.44 : x
  2. Step 2: Convert to fraction form
    80,781.40/111,458.10 = 48,521.44/x
  3. Step 3: Cross multiply
    80,781.40x = 111,458.10 × 48,521.44
  4. Step 4: Simplify right side
    80,781.40x = 5,408,107,511.66
  5. Step 5: Solve for x
    x = 5,408,107,511.66/80,781.40
  6. Step 6: Final answer
    x = 66,947.43

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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.