Finding the Fourth Proportional to 136,907.75, 188,932.70 and 77,291.75
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Solution
The fourth proportional to 136,907.75, 188,932.70 and 77,291.75 is: 106,662.62
Step by Step Solution
- Step 1: Write the proportion equation
136,907.75 : 188,932.70 = 77,291.75 : x - Step 2: Convert to fraction form
136,907.75/188,932.70 = 77,291.75/x - Step 3: Cross multiply
136,907.75x = 188,932.70 × 77,291.75 - Step 4: Simplify right side
136,907.75x = 14,602,939,015.23 - Step 5: Solve for x
x = 14,602,939,015.23/136,907.75 - Step 6: Final answer
x = 106,662.62
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.