Finding the Fourth Proportional to 149,138.27, 205,806.67 and 81,153.66
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Solution
The fourth proportional to 149,138.27, 205,806.67 and 81,153.66 is: 111,989.80
Step by Step Solution
- Step 1: Write the proportion equation
149,138.27 : 205,806.67 = 81,153.66 : x - Step 2: Convert to fraction form
149,138.27/205,806.67 = 81,153.66/x - Step 3: Cross multiply
149,138.27x = 205,806.67 × 81,153.66 - Step 4: Simplify right side
149,138.27x = 16,701,964,320.03 - Step 5: Solve for x
x = 16,701,964,320.03/149,138.27 - Step 6: Final answer
x = 111,989.80
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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.