Finding the Fourth Proportional to 128,806.41, 177,716.49 and 83,486.30
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Solution
The fourth proportional to 128,806.41, 177,716.49 and 83,486.30 is: 115,187.53
Step by Step Solution
- Step 1: Write the proportion equation
128,806.41 : 177,716.49 = 83,486.30 : x - Step 2: Convert to fraction form
128,806.41/177,716.49 = 83,486.30/x - Step 3: Cross multiply
128,806.41x = 177,716.49 × 83,486.30 - Step 4: Simplify right side
128,806.41x = 14,836,892,199.09 - Step 5: Solve for x
x = 14,836,892,199.09/128,806.41 - Step 6: Final answer
x = 115,187.53
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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.