Finding the Fourth Proportional to 128,371.20, 192,297.60 and 88,972.80
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Solution
The fourth proportional to 128,371.20, 192,297.60 and 88,972.80 is: 133,279.55
Step by Step Solution
- Step 1: Write the proportion equation
128,371.20 : 192,297.60 = 88,972.80 : x - Step 2: Convert to fraction form
128,371.20/192,297.60 = 88,972.80/x - Step 3: Cross multiply
128,371.20x = 192,297.60 × 88,972.80 - Step 4: Simplify right side
128,371.20x = 17,109,255,905.28 - Step 5: Solve for x
x = 17,109,255,905.28/128,371.20 - Step 6: Final answer
x = 133,279.55
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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.