Finding the Fourth Proportional to 206,755.75, 285,431.30 and 139,128.31
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Solution
The fourth proportional to 206,755.75, 285,431.30 and 139,128.31 is: 192,069.99
Step by Step Solution
- Step 1: Write the proportion equation
206,755.75 : 285,431.30 = 139,128.31 : x - Step 2: Convert to fraction form
206,755.75/285,431.30 = 139,128.31/x - Step 3: Cross multiply
206,755.75x = 285,431.30 × 139,128.31 - Step 4: Simplify right side
206,755.75x = 39,711,574,024.35 - Step 5: Solve for x
x = 39,711,574,024.35/206,755.75 - Step 6: Final answer
x = 192,069.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.