Finding the Fourth Proportional to 129,937.19, 194,905.79 and 31,441.19
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Solution
The fourth proportional to 129,937.19, 194,905.79 and 31,441.19 is: 47,161.79
Step by Step Solution
- Step 1: Write the proportion equation
129,937.19 : 194,905.79 = 31,441.19 : x - Step 2: Convert to fraction form
129,937.19/194,905.79 = 31,441.19/x - Step 3: Cross multiply
129,937.19x = 194,905.79 × 31,441.19 - Step 4: Simplify right side
129,937.19x = 6,128,069,975.49 - Step 5: Solve for x
x = 6,128,069,975.49/129,937.19 - Step 6: Final answer
x = 47,161.79
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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.