Finding the Fourth Proportional to 128,674.44, 192,862.44 and 76,128.12
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Solution
The fourth proportional to 128,674.44, 192,862.44 and 76,128.12 is: 114,103.90
Step by Step Solution
- Step 1: Write the proportion equation
128,674.44 : 192,862.44 = 76,128.12 : x - Step 2: Convert to fraction form
128,674.44/192,862.44 = 76,128.12/x - Step 3: Cross multiply
128,674.44x = 192,862.44 × 76,128.12 - Step 4: Simplify right side
128,674.44x = 14,682,254,975.81 - Step 5: Solve for x
x = 14,682,254,975.81/128,674.44 - Step 6: Final answer
x = 114,103.90
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1.5x scale
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.