Finding the Fourth Proportional to 128,658.39, 192,921.76 and 53,758.09
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Solution
The fourth proportional to 128,658.39, 192,921.76 and 53,758.09 is: 80,609.63
Step by Step Solution
- Step 1: Write the proportion equation
128,658.39 : 192,921.76 = 53,758.09 : x - Step 2: Convert to fraction form
128,658.39/192,921.76 = 53,758.09/x - Step 3: Cross multiply
128,658.39x = 192,921.76 × 53,758.09 - Step 4: Simplify right side
128,658.39x = 10,371,105,337.04 - Step 5: Solve for x
x = 10,371,105,337.04/128,658.39 - Step 6: Final answer
x = 80,609.63
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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.