Home / 139,831.92-209,581.38-80,544.78

Finding the Fourth Proportional to 139,831.92, 209,581.38 and 80,544.78

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Solution

The fourth proportional to 139,831.92, 209,581.38 and 80,544.78 is: 120,721.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,831.92 : 209,581.38 = 80,544.78 : x
  2. Step 2: Convert to fraction form
    139,831.92/209,581.38 = 80,544.78/x
  3. Step 3: Cross multiply
    139,831.92x = 209,581.38 × 80,544.78
  4. Step 4: Simplify right side
    139,831.92x = 16,880,686,144.20
  5. Step 5: Solve for x
    x = 16,880,686,144.20/139,831.92
  6. Step 6: Final answer
    x = 120,721.26

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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.