Finding the Fourth Proportional to 128,603.44, 192,905.18 and 53,682.72
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Solution
The fourth proportional to 128,603.44, 192,905.18 and 53,682.72 is: 80,524.09
Step by Step Solution
- Step 1: Write the proportion equation
128,603.44 : 192,905.18 = 53,682.72 : x - Step 2: Convert to fraction form
128,603.44/192,905.18 = 53,682.72/x - Step 3: Cross multiply
128,603.44x = 192,905.18 × 53,682.72 - Step 4: Simplify right side
128,603.44x = 10,355,674,764.49 - Step 5: Solve for x
x = 10,355,674,764.49/128,603.44 - Step 6: Final answer
x = 80,524.09
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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.