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Finding the Fourth Proportional to 80,940.60, 121,410.90 and 80,422.20

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Solution

The fourth proportional to 80,940.60, 121,410.90 and 80,422.20 is: 120,633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,940.60 : 121,410.90 = 80,422.20 : x
  2. Step 2: Convert to fraction form
    80,940.60/121,410.90 = 80,422.20/x
  3. Step 3: Cross multiply
    80,940.60x = 121,410.90 × 80,422.20
  4. Step 4: Simplify right side
    80,940.60x = 9,764,131,681.98
  5. Step 5: Solve for x
    x = 9,764,131,681.98/80,940.60
  6. Step 6: Final answer
    x = 120,633.30

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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.