Finding the Fourth Proportional to 225,138.44, 310,660.62 and 128,354.78
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Solution
The fourth proportional to 225,138.44, 310,660.62 and 128,354.78 is: 177,112.25
Step by Step Solution
- Step 1: Write the proportion equation
225,138.44 : 310,660.62 = 128,354.78 : x - Step 2: Convert to fraction form
225,138.44/310,660.62 = 128,354.78/x - Step 3: Cross multiply
225,138.44x = 310,660.62 × 128,354.78 - Step 4: Simplify right side
225,138.44x = 39,874,775,830.08 - Step 5: Solve for x
x = 39,874,775,830.08/225,138.44 - Step 6: Final answer
x = 177,112.25
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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.