Finding the Fourth Proportional to 203,825.20, 305,737.80 and 128,045.65
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Solution
The fourth proportional to 203,825.20, 305,737.80 and 128,045.65 is: 192,068.48
Step by Step Solution
- Step 1: Write the proportion equation
203,825.20 : 305,737.80 = 128,045.65 : x - Step 2: Convert to fraction form
203,825.20/305,737.80 = 128,045.65/x - Step 3: Cross multiply
203,825.20x = 305,737.80 × 128,045.65 - Step 4: Simplify right side
203,825.20x = 39,148,395,330.57 - Step 5: Solve for x
x = 39,148,395,330.57/203,825.20 - Step 6: Final answer
x = 192,068.48
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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.