Finding the Fourth Proportional to 129,418.64, 193,879.12 and 79,352.72
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Solution
The fourth proportional to 129,418.64, 193,879.12 and 79,352.72 is: 118,876.50
Step by Step Solution
- Step 1: Write the proportion equation
129,418.64 : 193,879.12 = 79,352.72 : x - Step 2: Convert to fraction form
129,418.64/193,879.12 = 79,352.72/x - Step 3: Cross multiply
129,418.64x = 193,879.12 × 79,352.72 - Step 4: Simplify right side
129,418.64x = 15,384,835,523.21 - Step 5: Solve for x
x = 15,384,835,523.21/129,418.64 - Step 6: Final answer
x = 118,876.50
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.