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Finding the Fourth Proportional to 45,561.72, 68,379.03 and 19,284.78

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Solution

The fourth proportional to 45,561.72, 68,379.03 and 19,284.78 is: 28,942.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,561.72 : 68,379.03 = 19,284.78 : x
  2. Step 2: Convert to fraction form
    45,561.72/68,379.03 = 19,284.78/x
  3. Step 3: Cross multiply
    45,561.72x = 68,379.03 × 19,284.78
  4. Step 4: Simplify right side
    45,561.72x = 1,318,674,550.16
  5. Step 5: Solve for x
    x = 1,318,674,550.16/45,561.72
  6. Step 6: Final answer
    x = 28,942.60

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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.