Finding the Fourth Proportional to 129,251.52, 193,980.96 and 66,939.84
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Solution
The fourth proportional to 129,251.52, 193,980.96 and 66,939.84 is: 100,463.46
Step by Step Solution
- Step 1: Write the proportion equation
129,251.52 : 193,980.96 = 66,939.84 : x - Step 2: Convert to fraction form
129,251.52/193,980.96 = 66,939.84/x - Step 3: Cross multiply
129,251.52x = 193,980.96 × 66,939.84 - Step 4: Simplify right side
129,251.52x = 12,985,054,425.45 - Step 5: Solve for x
x = 12,985,054,425.45/129,251.52 - Step 6: Final answer
x = 100,463.46
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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.