Finding the Fourth Proportional to 126,772.20, 190,158.30 and 84,781.80
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Solution
The fourth proportional to 126,772.20, 190,158.30 and 84,781.80 is: 127,172.70
Step by Step Solution
- Step 1: Write the proportion equation
126,772.20 : 190,158.30 = 84,781.80 : x - Step 2: Convert to fraction form
126,772.20/190,158.30 = 84,781.80/x - Step 3: Cross multiply
126,772.20x = 190,158.30 × 84,781.80 - Step 4: Simplify right side
126,772.20x = 16,121,962,958.94 - Step 5: Solve for x
x = 16,121,962,958.94/126,772.20 - Step 6: Final answer
x = 127,172.70
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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.