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Finding the Fourth Proportional to 111,979.60, 168,007.80 and 49,694.80

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Solution

The fourth proportional to 111,979.60, 168,007.80 and 49,694.80 is: 74,559.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,979.60 : 168,007.80 = 49,694.80 : x
  2. Step 2: Convert to fraction form
    111,979.60/168,007.80 = 49,694.80/x
  3. Step 3: Cross multiply
    111,979.60x = 168,007.80 × 49,694.80
  4. Step 4: Simplify right side
    111,979.60x = 8,349,114,019.44
  5. Step 5: Solve for x
    x = 8,349,114,019.44/111,979.60
  6. Step 6: Final answer
    x = 74,559.24

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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.