Finding the Fourth Proportional to 216,787.68, 299,138.94 and 121,275.72
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Solution
The fourth proportional to 216,787.68, 299,138.94 and 121,275.72 is: 167,344.80
Step by Step Solution
- Step 1: Write the proportion equation
216,787.68 : 299,138.94 = 121,275.72 : x - Step 2: Convert to fraction form
216,787.68/299,138.94 = 121,275.72/x - Step 3: Cross multiply
216,787.68x = 299,138.94 × 121,275.72 - Step 4: Simplify right side
216,787.68x = 36,278,290,328.54 - Step 5: Solve for x
x = 36,278,290,328.54/216,787.68 - Step 6: Final answer
x = 167,344.80
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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.