Finding the Fourth Proportional to 213,165.51, 319,470.61 and 86,657.99
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Solution
The fourth proportional to 213,165.51, 319,470.61 and 86,657.99 is: 129,874.11
Step by Step Solution
- Step 1: Write the proportion equation
213,165.51 : 319,470.61 = 86,657.99 : x - Step 2: Convert to fraction form
213,165.51/319,470.61 = 86,657.99/x - Step 3: Cross multiply
213,165.51x = 319,470.61 × 86,657.99 - Step 4: Simplify right side
213,165.51x = 27,684,680,926.67 - Step 5: Solve for x
x = 27,684,680,926.67/213,165.51 - Step 6: Final answer
x = 129,874.11
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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.