Home / 129,183.09-178,289.06-72,594.42

Finding the Fourth Proportional to 129,183.09, 178,289.06 and 72,594.42

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Solution

The fourth proportional to 129,183.09, 178,289.06 and 72,594.42 is: 100,189.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,183.09 : 178,289.06 = 72,594.42 : x
  2. Step 2: Convert to fraction form
    129,183.09/178,289.06 = 72,594.42/x
  3. Step 3: Cross multiply
    129,183.09x = 178,289.06 × 72,594.42
  4. Step 4: Simplify right side
    129,183.09x = 12,942,790,540.07
  5. Step 5: Solve for x
    x = 12,942,790,540.07/129,183.09
  6. Step 6: Final answer
    x = 100,189.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.