Home / 109,491.16-151,183.32-85,685.68

Finding the Fourth Proportional to 109,491.16, 151,183.32 and 85,685.68

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Solution

The fourth proportional to 109,491.16, 151,183.32 and 85,685.68 is: 118,313.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,491.16 : 151,183.32 = 85,685.68 : x
  2. Step 2: Convert to fraction form
    109,491.16/151,183.32 = 85,685.68/x
  3. Step 3: Cross multiply
    109,491.16x = 151,183.32 × 85,685.68
  4. Step 4: Simplify right side
    109,491.16x = 12,954,245,578.86
  5. Step 5: Solve for x
    x = 12,954,245,578.86/109,491.16
  6. Step 6: Final answer
    x = 118,313.16

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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.