Finding the Fourth Proportional to 128,611.20, 192,916.80 and 44,371.20
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Solution
The fourth proportional to 128,611.20, 192,916.80 and 44,371.20 is: 66,556.80
Step by Step Solution
- Step 1: Write the proportion equation
128,611.20 : 192,916.80 = 44,371.20 : x - Step 2: Convert to fraction form
128,611.20/192,916.80 = 44,371.20/x - Step 3: Cross multiply
128,611.20x = 192,916.80 × 44,371.20 - Step 4: Simplify right side
128,611.20x = 8,559,949,916.16 - Step 5: Solve for x
x = 8,559,949,916.16/128,611.20 - Step 6: Final answer
x = 66,556.80
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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.