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Finding the Fourth Proportional to 80,628.65, 120,944.05 and 28,039.13

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Solution

The fourth proportional to 80,628.65, 120,944.05 and 28,039.13 is: 42,059.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,628.65 : 120,944.05 = 28,039.13 : x
  2. Step 2: Convert to fraction form
    80,628.65/120,944.05 = 28,039.13/x
  3. Step 3: Cross multiply
    80,628.65x = 120,944.05 × 28,039.13
  4. Step 4: Simplify right side
    80,628.65x = 3,391,165,940.68
  5. Step 5: Solve for x
    x = 3,391,165,940.68/80,628.65
  6. Step 6: Final answer
    x = 42,059.07

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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.