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Finding the Fourth Proportional to 70,745.44, 106,081.64 and 20,819.06

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Solution

The fourth proportional to 70,745.44, 106,081.64 and 20,819.06 is: 31,217.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,745.44 : 106,081.64 = 20,819.06 : x
  2. Step 2: Convert to fraction form
    70,745.44/106,081.64 = 20,819.06/x
  3. Step 3: Cross multiply
    70,745.44x = 106,081.64 × 20,819.06
  4. Step 4: Simplify right side
    70,745.44x = 2,208,520,028.06
  5. Step 5: Solve for x
    x = 2,208,520,028.06/70,745.44
  6. Step 6: Final answer
    x = 31,217.84

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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.