Finding the Fourth Proportional to 221,680.64, 305,911.68 and 126,191.36
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Solution
The fourth proportional to 221,680.64, 305,911.68 and 126,191.36 is: 174,139.75
Step by Step Solution
- Step 1: Write the proportion equation
221,680.64 : 305,911.68 = 126,191.36 : x - Step 2: Convert to fraction form
221,680.64/305,911.68 = 126,191.36/x - Step 3: Cross multiply
221,680.64x = 305,911.68 × 126,191.36 - Step 4: Simplify right side
221,680.64x = 38,603,410,939.08 - Step 5: Solve for x
x = 38,603,410,939.08/221,680.64 - Step 6: Final answer
x = 174,139.75
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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.