Finding the Fourth Proportional to 129,095.21, 178,165.26 and 78,135.97
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Solution
The fourth proportional to 129,095.21, 178,165.26 and 78,135.97 is: 107,836.03
Step by Step Solution
- Step 1: Write the proportion equation
129,095.21 : 178,165.26 = 78,135.97 : x - Step 2: Convert to fraction form
129,095.21/178,165.26 = 78,135.97/x - Step 3: Cross multiply
129,095.21x = 178,165.26 × 78,135.97 - Step 4: Simplify right side
129,095.21x = 13,921,114,964.99 - Step 5: Solve for x
x = 13,921,114,964.99/129,095.21 - Step 6: Final answer
x = 107,836.03
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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.