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Finding the Fourth Proportional to 118,221.80, 177,348.90 and 43,323.80

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Solution

The fourth proportional to 118,221.80, 177,348.90 and 43,323.80 is: 64,991.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,221.80 : 177,348.90 = 43,323.80 : x
  2. Step 2: Convert to fraction form
    118,221.80/177,348.90 = 43,323.80/x
  3. Step 3: Cross multiply
    118,221.80x = 177,348.90 × 43,323.80
  4. Step 4: Simplify right side
    118,221.80x = 7,683,428,273.82
  5. Step 5: Solve for x
    x = 7,683,428,273.82/118,221.80
  6. Step 6: Final answer
    x = 64,991.64

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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.