Finding the Fourth Proportional to 84,138.84, 126,207.12 and 20,959.44
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Solution
The fourth proportional to 84,138.84, 126,207.12 and 20,959.44 is: 31,438.88
Step by Step Solution
- Step 1: Write the proportion equation
84,138.84 : 126,207.12 = 20,959.44 : x - Step 2: Convert to fraction form
84,138.84/126,207.12 = 20,959.44/x - Step 3: Cross multiply
84,138.84x = 126,207.12 × 20,959.44 - Step 4: Simplify right side
84,138.84x = 2,645,230,559.21 - Step 5: Solve for x
x = 2,645,230,559.21/84,138.84 - Step 6: Final answer
x = 31,438.88
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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.