Finding the Fourth Proportional to 213,821.66, 320,980.95 and 125,138.81
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Solution
The fourth proportional to 213,821.66, 320,980.95 and 125,138.81 is: 187,853.62
Step by Step Solution
- Step 1: Write the proportion equation
213,821.66 : 320,980.95 = 125,138.81 : x - Step 2: Convert to fraction form
213,821.66/320,980.95 = 125,138.81/x - Step 3: Cross multiply
213,821.66x = 320,980.95 × 125,138.81 - Step 4: Simplify right side
213,821.66x = 40,167,172,510.76 - Step 5: Solve for x
x = 40,167,172,510.76/213,821.66 - Step 6: Final answer
x = 187,853.62
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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.