Finding the Fourth Proportional to 128,390.13, 192,460.04 and 53,531.67
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Solution
The fourth proportional to 128,390.13, 192,460.04 and 53,531.67 is: 80,245.32
Step by Step Solution
- Step 1: Write the proportion equation
128,390.13 : 192,460.04 = 53,531.67 : x - Step 2: Convert to fraction form
128,390.13/192,460.04 = 53,531.67/x - Step 3: Cross multiply
128,390.13x = 192,460.04 × 53,531.67 - Step 4: Simplify right side
128,390.13x = 10,302,707,081.81 - Step 5: Solve for x
x = 10,302,707,081.81/128,390.13 - Step 6: Final answer
x = 80,245.32
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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.