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Finding the Fourth Proportional to 80,550.12, 120,723.12 and 45,509.52

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Solution

The fourth proportional to 80,550.12, 120,723.12 and 45,509.52 is: 68,206.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,550.12 : 120,723.12 = 45,509.52 : x
  2. Step 2: Convert to fraction form
    80,550.12/120,723.12 = 45,509.52/x
  3. Step 3: Cross multiply
    80,550.12x = 120,723.12 × 45,509.52
  4. Step 4: Simplify right side
    80,550.12x = 5,494,051,244.10
  5. Step 5: Solve for x
    x = 5,494,051,244.10/80,550.12
  6. Step 6: Final answer
    x = 68,206.62

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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.