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Finding the Fourth Proportional to 80,900.82, 121,405.90 and 28,310.76

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Solution

The fourth proportional to 80,900.82, 121,405.90 and 28,310.76 is: 42,485.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,900.82 : 121,405.90 = 28,310.76 : x
  2. Step 2: Convert to fraction form
    80,900.82/121,405.90 = 28,310.76/x
  3. Step 3: Cross multiply
    80,900.82x = 121,405.90 × 28,310.76
  4. Step 4: Simplify right side
    80,900.82x = 3,437,093,297.48
  5. Step 5: Solve for x
    x = 3,437,093,297.48/80,900.82
  6. Step 6: Final answer
    x = 42,485.27

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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.