Home / 118,919.60-178,120.20-105,786.80

Finding the Fourth Proportional to 118,919.60, 178,120.20 and 105,786.80

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Solution

The fourth proportional to 118,919.60, 178,120.20 and 105,786.80 is: 158,449.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,919.60 : 178,120.20 = 105,786.80 : x
  2. Step 2: Convert to fraction form
    118,919.60/178,120.20 = 105,786.80/x
  3. Step 3: Cross multiply
    118,919.60x = 178,120.20 × 105,786.80
  4. Step 4: Simplify right side
    118,919.60x = 18,842,765,973.36
  5. Step 5: Solve for x
    x = 18,842,765,973.36/118,919.60
  6. Step 6: Final answer
    x = 158,449.62

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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.