Finding the Fourth Proportional to 129,587.94, 178,891.38 and 91,378.62
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Solution
The fourth proportional to 129,587.94, 178,891.38 and 91,378.62 is: 126,144.82
Step by Step Solution
- Step 1: Write the proportion equation
129,587.94 : 178,891.38 = 91,378.62 : x - Step 2: Convert to fraction form
129,587.94/178,891.38 = 91,378.62/x - Step 3: Cross multiply
129,587.94x = 178,891.38 × 91,378.62 - Step 4: Simplify right side
129,587.94x = 16,346,847,434.30 - Step 5: Solve for x
x = 16,346,847,434.30/129,587.94 - Step 6: Final answer
x = 126,144.82
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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.