Finding the Fourth Proportional to 128,448.59, 192,709.94 and 53,530.07
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Solution
The fourth proportional to 128,448.59, 192,709.94 and 53,530.07 is: 80,310.54
Step by Step Solution
- Step 1: Write the proportion equation
128,448.59 : 192,709.94 = 53,530.07 : x - Step 2: Convert to fraction form
128,448.59/192,709.94 = 53,530.07/x - Step 3: Cross multiply
128,448.59x = 192,709.94 × 53,530.07 - Step 4: Simplify right side
128,448.59x = 10,315,775,346.70 - Step 5: Solve for x
x = 10,315,775,346.70/128,448.59 - Step 6: Final answer
x = 80,310.54
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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.