Finding the Fourth Proportional to 206,857.70, 310,286.55 and 128,125.70
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Solution
The fourth proportional to 206,857.70, 310,286.55 and 128,125.70 is: 192,188.55
Step by Step Solution
- Step 1: Write the proportion equation
206,857.70 : 310,286.55 = 128,125.70 : x - Step 2: Convert to fraction form
206,857.70/310,286.55 = 128,125.70/x - Step 3: Cross multiply
206,857.70x = 310,286.55 × 128,125.70 - Step 4: Simplify right side
206,857.70x = 39,755,681,419.34 - Step 5: Solve for x
x = 39,755,681,419.34/206,857.70 - Step 6: Final answer
x = 192,188.55
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1.5x scale
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.