Finding the Fourth Proportional to 136,639.19, 188,563.08 and 76,213.74
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Solution
The fourth proportional to 136,639.19, 188,563.08 and 76,213.74 is: 105,175.52
Step by Step Solution
- Step 1: Write the proportion equation
136,639.19 : 188,563.08 = 76,213.74 : x - Step 2: Convert to fraction form
136,639.19/188,563.08 = 76,213.74/x - Step 3: Cross multiply
136,639.19x = 188,563.08 × 76,213.74 - Step 4: Simplify right side
136,639.19x = 14,371,097,552.72 - Step 5: Solve for x
x = 14,371,097,552.72/136,639.19 - Step 6: Final answer
x = 105,175.52
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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.