Finding the Fourth Proportional to 113,217.19, 155,969.67 and 79,161.95
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Solution
The fourth proportional to 113,217.19, 155,969.67 and 79,161.95 is: 109,054.68
Step by Step Solution
- Step 1: Write the proportion equation
113,217.19 : 155,969.67 = 79,161.95 : x - Step 2: Convert to fraction form
113,217.19/155,969.67 = 79,161.95/x - Step 3: Cross multiply
113,217.19x = 155,969.67 × 79,161.95 - Step 4: Simplify right side
113,217.19x = 12,346,863,607.98 - Step 5: Solve for x
x = 12,346,863,607.98/113,217.19 - Step 6: Final answer
x = 109,054.68
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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.