Finding the Fourth Proportional to 213,138.12, 294,109.68 and 117,638.70
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Solution
The fourth proportional to 213,138.12, 294,109.68 and 117,638.70 is: 162,329.86
Step by Step Solution
- Step 1: Write the proportion equation
213,138.12 : 294,109.68 = 117,638.70 : x - Step 2: Convert to fraction form
213,138.12/294,109.68 = 117,638.70/x - Step 3: Cross multiply
213,138.12x = 294,109.68 × 117,638.70 - Step 4: Simplify right side
213,138.12x = 34,598,680,412.62 - Step 5: Solve for x
x = 34,598,680,412.62/213,138.12 - Step 6: Final answer
x = 162,329.86
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.