Finding the Fourth Proportional to 159,138.12, 219,613.28 and 91,161.03
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Solution
The fourth proportional to 159,138.12, 219,613.28 and 91,161.03 is: 125,803.75
Step by Step Solution
- Step 1: Write the proportion equation
159,138.12 : 219,613.28 = 91,161.03 : x - Step 2: Convert to fraction form
159,138.12/219,613.28 = 91,161.03/x - Step 3: Cross multiply
159,138.12x = 219,613.28 × 91,161.03 - Step 4: Simplify right side
159,138.12x = 20,020,172,806.48 - Step 5: Solve for x
x = 20,020,172,806.48/159,138.12 - Step 6: Final answer
x = 125,803.75
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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.