Finding the Fourth Proportional to 137,622.76, 189,920.99 and 76,370.20
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Solution
The fourth proportional to 137,622.76, 189,920.99 and 76,370.20 is: 105,391.75
Step by Step Solution
- Step 1: Write the proportion equation
137,622.76 : 189,920.99 = 76,370.20 : x - Step 2: Convert to fraction form
137,622.76/189,920.99 = 76,370.20/x - Step 3: Cross multiply
137,622.76x = 189,920.99 × 76,370.20 - Step 4: Simplify right side
137,622.76x = 14,504,303,706.62 - Step 5: Solve for x
x = 14,504,303,706.62/137,622.76 - Step 6: Final answer
x = 105,391.75
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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.