Finding the Fourth Proportional to 76,928.80, 115,444.80 and 27,008.80
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Solution
The fourth proportional to 76,928.80, 115,444.80 and 27,008.80 is: 40,531.32
Step by Step Solution
- Step 1: Write the proportion equation
76,928.80 : 115,444.80 = 27,008.80 : x - Step 2: Convert to fraction form
76,928.80/115,444.80 = 27,008.80/x - Step 3: Cross multiply
76,928.80x = 115,444.80 × 27,008.80 - Step 4: Simplify right side
76,928.80x = 3,118,025,514.24 - Step 5: Solve for x
x = 3,118,025,514.24/76,928.80 - Step 6: Final answer
x = 40,531.32
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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.