Finding the Fourth Proportional to 138,657.80, 207,986.70 and 133,214.60
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Solution
The fourth proportional to 138,657.80, 207,986.70 and 133,214.60 is: 199,821.90
Step by Step Solution
- Step 1: Write the proportion equation
138,657.80 : 207,986.70 = 133,214.60 : x - Step 2: Convert to fraction form
138,657.80/207,986.70 = 133,214.60/x - Step 3: Cross multiply
138,657.80x = 207,986.70 × 133,214.60 - Step 4: Simplify right side
138,657.80x = 27,706,865,045.82 - Step 5: Solve for x
x = 27,706,865,045.82/138,657.80 - Step 6: Final answer
x = 199,821.90
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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.