Home / 118,286.20-177,137.70-78,628.60

Finding the Fourth Proportional to 118,286.20, 177,137.70 and 78,628.60

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Solution

The fourth proportional to 118,286.20, 177,137.70 and 78,628.60 is: 117,749.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,286.20 : 177,137.70 = 78,628.60 : x
  2. Step 2: Convert to fraction form
    118,286.20/177,137.70 = 78,628.60/x
  3. Step 3: Cross multiply
    118,286.20x = 177,137.70 × 78,628.60
  4. Step 4: Simplify right side
    118,286.20x = 13,928,089,358.22
  5. Step 5: Solve for x
    x = 13,928,089,358.22/118,286.20
  6. Step 6: Final answer
    x = 117,749.06

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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.