Finding the Fourth Proportional to 216,637.10, 298,957.15 and 121,142.70
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Solution
The fourth proportional to 216,637.10, 298,957.15 and 121,142.70 is: 167,175.78
Step by Step Solution
- Step 1: Write the proportion equation
216,637.10 : 298,957.15 = 121,142.70 : x - Step 2: Convert to fraction form
216,637.10/298,957.15 = 121,142.70/x - Step 3: Cross multiply
216,637.10x = 298,957.15 × 121,142.70 - Step 4: Simplify right side
216,637.10x = 36,216,476,335.31 - Step 5: Solve for x
x = 36,216,476,335.31/216,637.10 - Step 6: Final answer
x = 167,175.78
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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.