Finding the Fourth Proportional to 221,014.26, 305,000.92 and 129,138.94
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Solution
The fourth proportional to 221,014.26, 305,000.92 and 129,138.94 is: 178,212.46
Step by Step Solution
- Step 1: Write the proportion equation
221,014.26 : 305,000.92 = 129,138.94 : x - Step 2: Convert to fraction form
221,014.26/305,000.92 = 129,138.94/x - Step 3: Cross multiply
221,014.26x = 305,000.92 × 129,138.94 - Step 4: Simplify right side
221,014.26x = 39,387,495,507.82 - Step 5: Solve for x
x = 39,387,495,507.82/221,014.26 - Step 6: Final answer
x = 178,212.46
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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.