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Finding the Fourth Proportional to 111,859.60, 167,983.80 and 108,360.40

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Solution

The fourth proportional to 111,859.60, 167,983.80 and 108,360.40 is: 162,728.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,859.60 : 167,983.80 = 108,360.40 : x
  2. Step 2: Convert to fraction form
    111,859.60/167,983.80 = 108,360.40/x
  3. Step 3: Cross multiply
    111,859.60x = 167,983.80 × 108,360.40
  4. Step 4: Simplify right side
    111,859.60x = 18,202,791,761.52
  5. Step 5: Solve for x
    x = 18,202,791,761.52/111,859.60
  6. Step 6: Final answer
    x = 162,728.92

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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.