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Finding the Fourth Proportional to 48,450.56, 72,661.80 and 18,861.80

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Solution

The fourth proportional to 48,450.56, 72,661.80 and 18,861.80 is: 28,287.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,450.56 : 72,661.80 = 18,861.80 : x
  2. Step 2: Convert to fraction form
    48,450.56/72,661.80 = 18,861.80/x
  3. Step 3: Cross multiply
    48,450.56x = 72,661.80 × 18,861.80
  4. Step 4: Simplify right side
    48,450.56x = 1,370,532,339.24
  5. Step 5: Solve for x
    x = 1,370,532,339.24/48,450.56
  6. Step 6: Final answer
    x = 28,287.23

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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.