Finding the Fourth Proportional to 85,990.05, 128,913.96 and 32,670.99
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Solution
The fourth proportional to 85,990.05, 128,913.96 and 32,670.99 is: 48,979.47
Step by Step Solution
- Step 1: Write the proportion equation
85,990.05 : 128,913.96 = 32,670.99 : x - Step 2: Convert to fraction form
85,990.05/128,913.96 = 32,670.99/x - Step 3: Cross multiply
85,990.05x = 128,913.96 × 32,670.99 - Step 4: Simplify right side
85,990.05x = 4,211,746,698.02 - Step 5: Solve for x
x = 4,211,746,698.02/85,990.05 - Step 6: Final answer
x = 48,979.47
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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.