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Finding the Fourth Proportional to 111,940.40, 168,002.40 and 111,065.60

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Solution

The fourth proportional to 111,940.40, 168,002.40 and 111,065.60 is: 166,689.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,940.40 : 168,002.40 = 111,065.60 : x
  2. Step 2: Convert to fraction form
    111,940.40/168,002.40 = 111,065.60/x
  3. Step 3: Cross multiply
    111,940.40x = 168,002.40 × 111,065.60
  4. Step 4: Simplify right side
    111,940.40x = 18,659,287,357.44
  5. Step 5: Solve for x
    x = 18,659,287,357.44/111,940.40
  6. Step 6: Final answer
    x = 166,689.48

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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.