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Finding the Fourth Proportional to 45,679.38, 68,520.54 and 12,399.36

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Solution

The fourth proportional to 45,679.38, 68,520.54 and 12,399.36 is: 18,599.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,679.38 : 68,520.54 = 12,399.36 : x
  2. Step 2: Convert to fraction form
    45,679.38/68,520.54 = 12,399.36/x
  3. Step 3: Cross multiply
    45,679.38x = 68,520.54 × 12,399.36
  4. Step 4: Simplify right side
    45,679.38x = 849,610,842.85
  5. Step 5: Solve for x
    x = 849,610,842.85/45,679.38
  6. Step 6: Final answer
    x = 18,599.44

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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.