Home / 72,629.20-108,943.80-20,038.60

Finding the Fourth Proportional to 72,629.20, 108,943.80 and 20,038.60

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Solution

The fourth proportional to 72,629.20, 108,943.80 and 20,038.60 is: 30,057.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,629.20 : 108,943.80 = 20,038.60 : x
  2. Step 2: Convert to fraction form
    72,629.20/108,943.80 = 20,038.60/x
  3. Step 3: Cross multiply
    72,629.20x = 108,943.80 × 20,038.60
  4. Step 4: Simplify right side
    72,629.20x = 2,183,081,230.68
  5. Step 5: Solve for x
    x = 2,183,081,230.68/72,629.20
  6. Step 6: Final answer
    x = 30,057.90

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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.