Finding the Fourth Proportional to 129,943.18, 194,964.63 and 45,712.09
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Solution
The fourth proportional to 129,943.18, 194,964.63 and 45,712.09 is: 68,585.68
Step by Step Solution
- Step 1: Write the proportion equation
129,943.18 : 194,964.63 = 45,712.09 : x - Step 2: Convert to fraction form
129,943.18/194,964.63 = 45,712.09/x - Step 3: Cross multiply
129,943.18x = 194,964.63 × 45,712.09 - Step 4: Simplify right side
129,943.18x = 8,912,240,713.38 - Step 5: Solve for x
x = 8,912,240,713.38/129,943.18 - Step 6: Final answer
x = 68,585.68
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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.