Finding the Fourth Proportional to 129,770.30, 194,266.65 and 77,152.70
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Solution
The fourth proportional to 129,770.30, 194,266.65 and 77,152.70 is: 115,497.90
Step by Step Solution
- Step 1: Write the proportion equation
129,770.30 : 194,266.65 = 77,152.70 : x - Step 2: Convert to fraction form
129,770.30/194,266.65 = 77,152.70/x - Step 3: Cross multiply
129,770.30x = 194,266.65 × 77,152.70 - Step 4: Simplify right side
129,770.30x = 14,988,196,567.46 - Step 5: Solve for x
x = 14,988,196,567.46/129,770.30 - Step 6: Final answer
x = 115,497.90
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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.