Finding the Fourth Proportional to 128,240.38, 176,971.79 and 71,651.75
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Solution
The fourth proportional to 128,240.38, 176,971.79 and 71,651.75 is: 98,879.45
Step by Step Solution
- Step 1: Write the proportion equation
128,240.38 : 176,971.79 = 71,651.75 : x - Step 2: Convert to fraction form
128,240.38/176,971.79 = 71,651.75/x - Step 3: Cross multiply
128,240.38x = 176,971.79 × 71,651.75 - Step 4: Simplify right side
128,240.38x = 12,680,338,095.87 - Step 5: Solve for x
x = 12,680,338,095.87/128,240.38 - Step 6: Final answer
x = 98,879.45
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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.