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Finding the Fourth Proportional to 45,187.72, 67,777.80 and 14,020

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Solution

The fourth proportional to 45,187.72, 67,777.80 and 14,020 is: 21,028.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,187.72 : 67,777.80 = 14,020 : x
  2. Step 2: Convert to fraction form
    45,187.72/67,777.80 = 14,020/x
  3. Step 3: Cross multiply
    45,187.72x = 67,777.80 × 14,020
  4. Step 4: Simplify right side
    45,187.72x = 950,244,756
  5. Step 5: Solve for x
    x = 950,244,756/45,187.72
  6. Step 6: Final answer
    x = 21,028.83

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.