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Finding the Fourth Proportional to 225,812.96, 311,626.16 and 123,831.96

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Solution

The fourth proportional to 225,812.96, 311,626.16 and 123,831.96 is: 170,890.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,812.96 : 311,626.16 = 123,831.96 : x
  2. Step 2: Convert to fraction form
    225,812.96/311,626.16 = 123,831.96/x
  3. Step 3: Cross multiply
    225,812.96x = 311,626.16 × 123,831.96
  4. Step 4: Simplify right side
    225,812.96x = 38,589,278,180.07
  5. Step 5: Solve for x
    x = 38,589,278,180.07/225,812.96
  6. Step 6: Final answer
    x = 170,890.45

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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.