Finding the Fourth Proportional to 121,907.75, 182,804.19 and 79,143.99
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Solution
The fourth proportional to 121,907.75, 182,804.19 and 79,143.99 is: 118,678.70
Step by Step Solution
- Step 1: Write the proportion equation
121,907.75 : 182,804.19 = 79,143.99 : x - Step 2: Convert to fraction form
121,907.75/182,804.19 = 79,143.99/x - Step 3: Cross multiply
121,907.75x = 182,804.19 × 79,143.99 - Step 4: Simplify right side
121,907.75x = 14,467,852,985.32 - Step 5: Solve for x
x = 14,467,852,985.32/121,907.75 - Step 6: Final answer
x = 118,678.70
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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.