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Finding the Fourth Proportional to 111,874.20, 167,811.30 and 103,320.60

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Solution

The fourth proportional to 111,874.20, 167,811.30 and 103,320.60 is: 154,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,874.20 : 167,811.30 = 103,320.60 : x
  2. Step 2: Convert to fraction form
    111,874.20/167,811.30 = 103,320.60/x
  3. Step 3: Cross multiply
    111,874.20x = 167,811.30 × 103,320.60
  4. Step 4: Simplify right side
    111,874.20x = 17,338,364,202.78
  5. Step 5: Solve for x
    x = 17,338,364,202.78/111,874.20
  6. Step 6: Final answer
    x = 154,980.90

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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.