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Finding the Fourth Proportional to 41,123, 61,728.90 and 20,390.36

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Solution

The fourth proportional to 41,123, 61,728.90 and 20,390.36 is: 30,607.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,123 : 61,728.90 = 20,390.36 : x
  2. Step 2: Convert to fraction form
    41,123/61,728.90 = 20,390.36/x
  3. Step 3: Cross multiply
    41,123x = 61,728.90 × 20,390.36
  4. Step 4: Simplify right side
    41,123x = 1,258,674,493.40
  5. Step 5: Solve for x
    x = 1,258,674,493.40/41,123
  6. Step 6: Final answer
    x = 30,607.56

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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.