Finding the Fourth Proportional to 135,409.75, 186,863.15 and 74,979.09
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Solution
The fourth proportional to 135,409.75, 186,863.15 and 74,979.09 is: 103,469.87
Step by Step Solution
- Step 1: Write the proportion equation
135,409.75 : 186,863.15 = 74,979.09 : x - Step 2: Convert to fraction form
135,409.75/186,863.15 = 74,979.09/x - Step 3: Cross multiply
135,409.75x = 186,863.15 × 74,979.09 - Step 4: Simplify right side
135,409.75x = 14,010,829,128.98 - Step 5: Solve for x
x = 14,010,829,128.98/135,409.75 - Step 6: Final answer
x = 103,469.87
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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.