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Finding the Fourth Proportional to 45,379.98, 68,073.21 and 12,099.87

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Solution

The fourth proportional to 45,379.98, 68,073.21 and 12,099.87 is: 18,150.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,379.98 : 68,073.21 = 12,099.87 : x
  2. Step 2: Convert to fraction form
    45,379.98/68,073.21 = 12,099.87/x
  3. Step 3: Cross multiply
    45,379.98x = 68,073.21 × 12,099.87
  4. Step 4: Simplify right side
    45,379.98x = 823,676,991.48
  5. Step 5: Solve for x
    x = 823,676,991.48/45,379.98
  6. Step 6: Final answer
    x = 18,150.67

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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.