Finding the Fourth Proportional to 139,821.40, 192,926.97 and 82,478.74
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Solution
The fourth proportional to 139,821.40, 192,926.97 and 82,478.74 is: 113,804.99
Step by Step Solution
- Step 1: Write the proportion equation
139,821.40 : 192,926.97 = 82,478.74 : x - Step 2: Convert to fraction form
139,821.40/192,926.97 = 82,478.74/x - Step 3: Cross multiply
139,821.40x = 192,926.97 × 82,478.74 - Step 4: Simplify right side
139,821.40x = 15,912,373,397.62 - Step 5: Solve for x
x = 15,912,373,397.62/139,821.40 - Step 6: Final answer
x = 113,804.99
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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.