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Finding the Fourth Proportional to 41,990.78, 57,928.56 and 28,374.46

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Solution

The fourth proportional to 41,990.78, 57,928.56 and 28,374.46 is: 39,144.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,990.78 : 57,928.56 = 28,374.46 : x
  2. Step 2: Convert to fraction form
    41,990.78/57,928.56 = 28,374.46/x
  3. Step 3: Cross multiply
    41,990.78x = 57,928.56 × 28,374.46
  4. Step 4: Simplify right side
    41,990.78x = 1,643,691,608.58
  5. Step 5: Solve for x
    x = 1,643,691,608.58/41,990.78
  6. Step 6: Final answer
    x = 39,144.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.