Finding the Fourth Proportional to 231,128.76, 318,951.62 and 129,155.08
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Solution
The fourth proportional to 231,128.76, 318,951.62 and 129,155.08 is: 178,230.62
Step by Step Solution
- Step 1: Write the proportion equation
231,128.76 : 318,951.62 = 129,155.08 : x - Step 2: Convert to fraction form
231,128.76/318,951.62 = 129,155.08/x - Step 3: Cross multiply
231,128.76x = 318,951.62 × 129,155.08 - Step 4: Simplify right side
231,128.76x = 41,194,221,997.23 - Step 5: Solve for x
x = 41,194,221,997.23/231,128.76 - Step 6: Final answer
x = 178,230.62
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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.