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Finding the Fourth Proportional to 49,956, 68,954.05 and 28,750.20

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Solution

The fourth proportional to 49,956, 68,954.05 and 28,750.20 is: 39,683.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,956 : 68,954.05 = 28,750.20 : x
  2. Step 2: Convert to fraction form
    49,956/68,954.05 = 28,750.20/x
  3. Step 3: Cross multiply
    49,956x = 68,954.05 × 28,750.20
  4. Step 4: Simplify right side
    49,956x = 1,982,442,728.31
  5. Step 5: Solve for x
    x = 1,982,442,728.31/49,956
  6. Step 6: Final answer
    x = 39,683.78

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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.