Finding the Fourth Proportional to 157,909.62, 217,906.12 and 86,290.22
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Solution
The fourth proportional to 157,909.62, 217,906.12 and 86,290.22 is: 119,075.50
Step by Step Solution
- Step 1: Write the proportion equation
157,909.62 : 217,906.12 = 86,290.22 : x - Step 2: Convert to fraction form
157,909.62/217,906.12 = 86,290.22/x - Step 3: Cross multiply
157,909.62x = 217,906.12 × 86,290.22 - Step 4: Simplify right side
157,909.62x = 18,803,167,034.15 - Step 5: Solve for x
x = 18,803,167,034.15/157,909.62 - Step 6: Final answer
x = 119,075.50
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.