Finding the Fourth Proportional to 105,728.96, 145,912.62 and 69,856.08
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Solution
The fourth proportional to 105,728.96, 145,912.62 and 69,856.08 is: 96,405.79
Step by Step Solution
- Step 1: Write the proportion equation
105,728.96 : 145,912.62 = 69,856.08 : x - Step 2: Convert to fraction form
105,728.96/145,912.62 = 69,856.08/x - Step 3: Cross multiply
105,728.96x = 145,912.62 × 69,856.08 - Step 4: Simplify right side
105,728.96x = 10,192,883,655.73 - Step 5: Solve for x
x = 10,192,883,655.73/105,728.96 - Step 6: Final answer
x = 96,405.79
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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.