Finding the Fourth Proportional to 136,205.45, 187,965.25 and 74,958.69
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Solution
The fourth proportional to 136,205.45, 187,965.25 and 74,958.69 is: 103,443.95
Step by Step Solution
- Step 1: Write the proportion equation
136,205.45 : 187,965.25 = 74,958.69 : x - Step 2: Convert to fraction form
136,205.45/187,965.25 = 74,958.69/x - Step 3: Cross multiply
136,205.45x = 187,965.25 × 74,958.69 - Step 4: Simplify right side
136,205.45x = 14,089,629,562.83 - Step 5: Solve for x
x = 14,089,629,562.83/136,205.45 - Step 6: Final answer
x = 103,443.95
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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.