Finding the Fourth Proportional to 90,491.12, 135,736.68 and 28,161.62
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Solution
The fourth proportional to 90,491.12, 135,736.68 and 28,161.62 is: 42,242.43
Step by Step Solution
- Step 1: Write the proportion equation
90,491.12 : 135,736.68 = 28,161.62 : x - Step 2: Convert to fraction form
90,491.12/135,736.68 = 28,161.62/x - Step 3: Cross multiply
90,491.12x = 135,736.68 × 28,161.62 - Step 4: Simplify right side
90,491.12x = 3,822,564,802.22 - Step 5: Solve for x
x = 3,822,564,802.22/90,491.12 - Step 6: Final answer
x = 42,242.43
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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.