Finding the Fourth Proportional to 129,774.36, 194,661.18 and 31,278.36
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Solution
The fourth proportional to 129,774.36, 194,661.18 and 31,278.36 is: 46,917.45
Step by Step Solution
- Step 1: Write the proportion equation
129,774.36 : 194,661.18 = 31,278.36 : x - Step 2: Convert to fraction form
129,774.36/194,661.18 = 31,278.36/x - Step 3: Cross multiply
129,774.36x = 194,661.18 × 31,278.36 - Step 4: Simplify right side
129,774.36x = 6,088,682,466.06 - Step 5: Solve for x
x = 6,088,682,466.06/129,774.36 - Step 6: Final answer
x = 46,917.45
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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.