Finding the Fourth Proportional to 206,885.70, 310,328.55 and 128,153.70
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Solution
The fourth proportional to 206,885.70, 310,328.55 and 128,153.70 is: 192,230.55
Step by Step Solution
- Step 1: Write the proportion equation
206,885.70 : 310,328.55 = 128,153.70 : x - Step 2: Convert to fraction form
206,885.70/310,328.55 = 128,153.70/x - Step 3: Cross multiply
206,885.70x = 310,328.55 × 128,153.70 - Step 4: Simplify right side
206,885.70x = 39,769,751,898.14 - Step 5: Solve for x
x = 39,769,751,898.14/206,885.70 - Step 6: Final answer
x = 192,230.55
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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.