Finding the Fourth Proportional to 83,940.20, 115,836.08 and 48,128.07
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Solution
The fourth proportional to 83,940.20, 115,836.08 and 48,128.07 is: 66,415.94
Step by Step Solution
- Step 1: Write the proportion equation
83,940.20 : 115,836.08 = 48,128.07 : x - Step 2: Convert to fraction form
83,940.20/115,836.08 = 48,128.07/x - Step 3: Cross multiply
83,940.20x = 115,836.08 × 48,128.07 - Step 4: Simplify right side
83,940.20x = 5,574,967,160.51 - Step 5: Solve for x
x = 5,574,967,160.51/83,940.20 - Step 6: Final answer
x = 66,415.94
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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.