Finding the Fourth Proportional to 216,876.81, 299,308.73 and 121,382.13
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Solution
The fourth proportional to 216,876.81, 299,308.73 and 121,382.13 is: 167,517.82
Step by Step Solution
- Step 1: Write the proportion equation
216,876.81 : 299,308.73 = 121,382.13 : x - Step 2: Convert to fraction form
216,876.81/299,308.73 = 121,382.13/x - Step 3: Cross multiply
216,876.81x = 299,308.73 × 121,382.13 - Step 4: Simplify right side
216,876.81x = 36,330,730,568.08 - Step 5: Solve for x
x = 36,330,730,568.08/216,876.81 - Step 6: Final answer
x = 167,517.82
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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.