Finding the Fourth Proportional to 128,015.74, 191,964.16 and 74,723.11
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Solution
The fourth proportional to 128,015.74, 191,964.16 and 74,723.11 is: 112,049.96
Step by Step Solution
- Step 1: Write the proportion equation
128,015.74 : 191,964.16 = 74,723.11 : x - Step 2: Convert to fraction form
128,015.74/191,964.16 = 74,723.11/x - Step 3: Cross multiply
128,015.74x = 191,964.16 × 74,723.11 - Step 4: Simplify right side
128,015.74x = 14,344,158,657.23 - Step 5: Solve for x
x = 14,344,158,657.23/128,015.74 - Step 6: Final answer
x = 112,049.96
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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.