Finding the Fourth Proportional to 136,193.88, 187,888.20 and 85,117.70
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Solution
The fourth proportional to 136,193.88, 187,888.20 and 85,117.70 is: 117,425.33
Step by Step Solution
- Step 1: Write the proportion equation
136,193.88 : 187,888.20 = 85,117.70 : x - Step 2: Convert to fraction form
136,193.88/187,888.20 = 85,117.70/x - Step 3: Cross multiply
136,193.88x = 187,888.20 × 85,117.70 - Step 4: Simplify right side
136,193.88x = 15,992,611,441.14 - Step 5: Solve for x
x = 15,992,611,441.14/136,193.88 - Step 6: Final answer
x = 117,425.33
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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.