Finding the Fourth Proportional to 102,990.75, 142,129.40 and 58,278.75
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Solution
The fourth proportional to 102,990.75, 142,129.40 and 58,278.75 is: 80,425.90
Step by Step Solution
- Step 1: Write the proportion equation
102,990.75 : 142,129.40 = 58,278.75 : x - Step 2: Convert to fraction form
102,990.75/142,129.40 = 58,278.75/x - Step 3: Cross multiply
102,990.75x = 142,129.40 × 58,278.75 - Step 4: Simplify right side
102,990.75x = 8,283,123,770.25 - Step 5: Solve for x
x = 8,283,123,770.25/102,990.75 - Step 6: Final answer
x = 80,425.90
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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.