Finding the Fourth Proportional to 128,286.81, 176,920.40 and 82,917.09
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Solution
The fourth proportional to 128,286.81, 176,920.40 and 82,917.09 is: 114,351.00
Step by Step Solution
- Step 1: Write the proportion equation
128,286.81 : 176,920.40 = 82,917.09 : x - Step 2: Convert to fraction form
128,286.81/176,920.40 = 82,917.09/x - Step 3: Cross multiply
128,286.81x = 176,920.40 × 82,917.09 - Step 4: Simplify right side
128,286.81x = 14,669,724,936.93 - Step 5: Solve for x
x = 14,669,724,936.93/128,286.81 - Step 6: Final answer
x = 114,351.00
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1.5x scale
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.