Finding the Fourth Proportional to 85,476.77, 128,229.74 and 38,109.05
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Solution
The fourth proportional to 85,476.77, 128,229.74 and 38,109.05 is: 57,170.08
Step by Step Solution
- Step 1: Write the proportion equation
85,476.77 : 128,229.74 = 38,109.05 : x - Step 2: Convert to fraction form
85,476.77/128,229.74 = 38,109.05/x - Step 3: Cross multiply
85,476.77x = 128,229.74 × 38,109.05 - Step 4: Simplify right side
85,476.77x = 4,886,713,382.60 - Step 5: Solve for x
x = 4,886,713,382.60/85,476.77 - Step 6: Final answer
x = 57,170.08
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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.