Finding the Fourth Proportional to 71,418.36, 107,122.86 and 18,828.12
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Solution
The fourth proportional to 71,418.36, 107,122.86 and 18,828.12 is: 28,240.95
Step by Step Solution
- Step 1: Write the proportion equation
71,418.36 : 107,122.86 = 18,828.12 : x - Step 2: Convert to fraction form
71,418.36/107,122.86 = 18,828.12/x - Step 3: Cross multiply
71,418.36x = 107,122.86 × 18,828.12 - Step 4: Simplify right side
71,418.36x = 2,016,922,062.82 - Step 5: Solve for x
x = 2,016,922,062.82/71,418.36 - Step 6: Final answer
x = 28,240.95
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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.