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Finding the Fourth Proportional to 111,920.64, 167,704.63 and 66,831.53

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Solution

The fourth proportional to 111,920.64, 167,704.63 and 66,831.53 is: 100,142.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,920.64 : 167,704.63 = 66,831.53 : x
  2. Step 2: Convert to fraction form
    111,920.64/167,704.63 = 66,831.53/x
  3. Step 3: Cross multiply
    111,920.64x = 167,704.63 × 66,831.53
  4. Step 4: Simplify right side
    111,920.64x = 11,207,956,948.72
  5. Step 5: Solve for x
    x = 11,207,956,948.72/111,920.64
  6. Step 6: Final answer
    x = 100,142.01

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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.