Finding the Fourth Proportional to 128,163.60, 192,439.80 and 98,614.80
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Solution
The fourth proportional to 128,163.60, 192,439.80 and 98,614.80 is: 148,071.78
Step by Step Solution
- Step 1: Write the proportion equation
128,163.60 : 192,439.80 = 98,614.80 : x - Step 2: Convert to fraction form
128,163.60/192,439.80 = 98,614.80/x - Step 3: Cross multiply
128,163.60x = 192,439.80 × 98,614.80 - Step 4: Simplify right side
128,163.60x = 18,977,412,389.04 - Step 5: Solve for x
x = 18,977,412,389.04/128,163.60 - Step 6: Final answer
x = 148,071.78
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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.