Finding the Fourth Proportional to 128,125.26, 192,031.92 and 90,695.94
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Solution
The fourth proportional to 128,125.26, 192,031.92 and 90,695.94 is: 135,933.50
Step by Step Solution
- Step 1: Write the proportion equation
128,125.26 : 192,031.92 = 90,695.94 : x - Step 2: Convert to fraction form
128,125.26/192,031.92 = 90,695.94/x - Step 3: Cross multiply
128,125.26x = 192,031.92 × 90,695.94 - Step 4: Simplify right side
128,125.26x = 17,416,515,494.40 - Step 5: Solve for x
x = 17,416,515,494.40/128,125.26 - Step 6: Final answer
x = 135,933.50
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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.