Finding the Fourth Proportional to 80,939.18, 121,412.40 and 30,350.18
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Solution
The fourth proportional to 80,939.18, 121,412.40 and 30,350.18 is: 45,526.63
Step by Step Solution
- Step 1: Write the proportion equation
80,939.18 : 121,412.40 = 30,350.18 : x - Step 2: Convert to fraction form
80,939.18/121,412.40 = 30,350.18/x - Step 3: Cross multiply
80,939.18x = 121,412.40 × 30,350.18 - Step 4: Simplify right side
80,939.18x = 3,684,888,194.23 - Step 5: Solve for x
x = 3,684,888,194.23/80,939.18 - Step 6: Final answer
x = 45,526.63
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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.