Finding the Fourth Proportional to 139,846.49, 192,981.44 and 79,409.15
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Solution
The fourth proportional to 139,846.49, 192,981.44 and 79,409.15 is: 109,580.81
Step by Step Solution
- Step 1: Write the proportion equation
139,846.49 : 192,981.44 = 79,409.15 : x - Step 2: Convert to fraction form
139,846.49/192,981.44 = 79,409.15/x - Step 3: Cross multiply
139,846.49x = 192,981.44 × 79,409.15 - Step 4: Simplify right side
139,846.49x = 15,324,490,754.22 - Step 5: Solve for x
x = 15,324,490,754.22/139,846.49 - Step 6: Final answer
x = 109,580.81
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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.