Finding the Fourth Proportional to 129,712.19, 178,982.26 and 73,112.63
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Solution
The fourth proportional to 129,712.19, 178,982.26 and 73,112.63 is: 100,883.84
Step by Step Solution
- Step 1: Write the proportion equation
129,712.19 : 178,982.26 = 73,112.63 : x - Step 2: Convert to fraction form
129,712.19/178,982.26 = 73,112.63/x - Step 3: Cross multiply
129,712.19x = 178,982.26 × 73,112.63 - Step 4: Simplify right side
129,712.19x = 13,085,862,674.25 - Step 5: Solve for x
x = 13,085,862,674.25/129,712.19 - Step 6: Final answer
x = 100,883.84
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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.