Finding the Fourth Proportional to 135,278.16, 186,713.28 and 78,696.96
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Solution
The fourth proportional to 135,278.16, 186,713.28 and 78,696.96 is: 108,618.92
Step by Step Solution
- Step 1: Write the proportion equation
135,278.16 : 186,713.28 = 78,696.96 : x - Step 2: Convert to fraction form
135,278.16/186,713.28 = 78,696.96/x - Step 3: Cross multiply
135,278.16x = 186,713.28 × 78,696.96 - Step 4: Simplify right side
135,278.16x = 14,693,767,527.63 - Step 5: Solve for x
x = 14,693,767,527.63/135,278.16 - Step 6: Final answer
x = 108,618.92
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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.