Finding the Fourth Proportional to 136,916.11, 188,944.21 and 76,486.74
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Solution
The fourth proportional to 136,916.11, 188,944.21 and 76,486.74 is: 105,551.69
Step by Step Solution
- Step 1: Write the proportion equation
136,916.11 : 188,944.21 = 76,486.74 : x - Step 2: Convert to fraction form
136,916.11/188,944.21 = 76,486.74/x - Step 3: Cross multiply
136,916.11x = 188,944.21 × 76,486.74 - Step 4: Simplify right side
136,916.11x = 14,451,726,664.78 - Step 5: Solve for x
x = 14,451,726,664.78/136,916.11 - Step 6: Final answer
x = 105,551.69
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1.5x scale
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.