Finding the Fourth Proportional to 136,918.09, 188,940.21 and 76,476.70
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Solution
The fourth proportional to 136,918.09, 188,940.21 and 76,476.70 is: 105,534.07
Step by Step Solution
- Step 1: Write the proportion equation
136,918.09 : 188,940.21 = 76,476.70 : x - Step 2: Convert to fraction form
136,918.09/188,940.21 = 76,476.70/x - Step 3: Cross multiply
136,918.09x = 188,940.21 × 76,476.70 - Step 4: Simplify right side
136,918.09x = 14,449,523,758.11 - Step 5: Solve for x
x = 14,449,523,758.11/136,918.09 - Step 6: Final answer
x = 105,534.07
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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.