Finding the Fourth Proportional to 121,928.82, 168,319.29 and 91,725.65
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Solution
The fourth proportional to 121,928.82, 168,319.29 and 91,725.65 is: 126,624.66
Step by Step Solution
- Step 1: Write the proportion equation
121,928.82 : 168,319.29 = 91,725.65 : x - Step 2: Convert to fraction form
121,928.82/168,319.29 = 91,725.65/x - Step 3: Cross multiply
121,928.82x = 168,319.29 × 91,725.65 - Step 4: Simplify right side
121,928.82x = 15,439,195,441.19 - Step 5: Solve for x
x = 15,439,195,441.19/121,928.82 - Step 6: Final answer
x = 126,624.66
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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.