Finding the Fourth Proportional to 128,575.28, 192,893.70 and 53,653.75
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Solution
The fourth proportional to 128,575.28, 192,893.70 and 53,653.75 is: 80,493.47
Step by Step Solution
- Step 1: Write the proportion equation
128,575.28 : 192,893.70 = 53,653.75 : x - Step 2: Convert to fraction form
128,575.28/192,893.70 = 53,653.75/x - Step 3: Cross multiply
128,575.28x = 192,893.70 × 53,653.75 - Step 4: Simplify right side
128,575.28x = 10,349,470,075.34 - Step 5: Solve for x
x = 10,349,470,075.34/128,575.28 - Step 6: Final answer
x = 80,493.47
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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.