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Finding the Fourth Proportional to 118,467.36, 177,771.04 and 43,640

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Solution

The fourth proportional to 118,467.36, 177,771.04 and 43,640 is: 65,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,467.36 : 177,771.04 = 43,640 : x
  2. Step 2: Convert to fraction form
    118,467.36/177,771.04 = 43,640/x
  3. Step 3: Cross multiply
    118,467.36x = 177,771.04 × 43,640
  4. Step 4: Simplify right side
    118,467.36x = 7,757,928,185.60
  5. Step 5: Solve for x
    x = 7,757,928,185.60/118,467.36
  6. Step 6: Final answer
    x = 65,485.79

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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.