Finding the Fourth Proportional to 80,015.12, 110,357.88 and 74,649.68
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Solution
The fourth proportional to 80,015.12, 110,357.88 and 74,649.68 is: 102,957.80
Step by Step Solution
- Step 1: Write the proportion equation
80,015.12 : 110,357.88 = 74,649.68 : x - Step 2: Convert to fraction form
80,015.12/110,357.88 = 74,649.68/x - Step 3: Cross multiply
80,015.12x = 110,357.88 × 74,649.68 - Step 4: Simplify right side
80,015.12x = 8,238,180,427.48 - Step 5: Solve for x
x = 8,238,180,427.48/80,015.12 - Step 6: Final answer
x = 102,957.80
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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.