Finding the Fourth Proportional to 69,121.21, 103,515.74 and 39,449.09
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Solution
The fourth proportional to 69,121.21, 103,515.74 and 39,449.09 is: 59,078.85
Step by Step Solution
- Step 1: Write the proportion equation
69,121.21 : 103,515.74 = 39,449.09 : x - Step 2: Convert to fraction form
69,121.21/103,515.74 = 39,449.09/x - Step 3: Cross multiply
69,121.21x = 103,515.74 × 39,449.09 - Step 4: Simplify right side
69,121.21x = 4,083,601,614.28 - Step 5: Solve for x
x = 4,083,601,614.28/69,121.21 - Step 6: Final answer
x = 59,078.85
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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.