Finding the Fourth Proportional to 138,661.80, 207,992.70 and 133,218.60
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Solution
The fourth proportional to 138,661.80, 207,992.70 and 133,218.60 is: 199,827.90
Step by Step Solution
- Step 1: Write the proportion equation
138,661.80 : 207,992.70 = 133,218.60 : x - Step 2: Convert to fraction form
138,661.80/207,992.70 = 133,218.60/x - Step 3: Cross multiply
138,661.80x = 207,992.70 × 133,218.60 - Step 4: Simplify right side
138,661.80x = 27,708,496,304.22 - Step 5: Solve for x
x = 27,708,496,304.22/138,661.80 - Step 6: Final answer
x = 199,827.90
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.