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Finding the Fourth Proportional to 118,391.80, 177,579.60 and 38,428.60

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Solution

The fourth proportional to 118,391.80, 177,579.60 and 38,428.60 is: 57,640.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,391.80 : 177,579.60 = 38,428.60 : x
  2. Step 2: Convert to fraction form
    118,391.80/177,579.60 = 38,428.60/x
  3. Step 3: Cross multiply
    118,391.80x = 177,579.60 × 38,428.60
  4. Step 4: Simplify right side
    118,391.80x = 6,824,135,416.56
  5. Step 5: Solve for x
    x = 6,824,135,416.56/118,391.80
  6. Step 6: Final answer
    x = 57,640.27

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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.