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Finding the Fourth Proportional to 68,831.96, 103,235.60 and 18,231.32

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Solution

The fourth proportional to 68,831.96, 103,235.60 and 18,231.32 is: 27,343.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,831.96 : 103,235.60 = 18,231.32 : x
  2. Step 2: Convert to fraction form
    68,831.96/103,235.60 = 18,231.32/x
  3. Step 3: Cross multiply
    68,831.96x = 103,235.60 × 18,231.32
  4. Step 4: Simplify right side
    68,831.96x = 1,882,121,258.99
  5. Step 5: Solve for x
    x = 1,882,121,258.99/68,831.96
  6. Step 6: Final answer
    x = 27,343.71

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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.