Finding the Fourth Proportional to 68,724.76, 103,135.80 and 31,289.68
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Solution
The fourth proportional to 68,724.76, 103,135.80 and 31,289.68 is: 46,956.67
Step by Step Solution
- Step 1: Write the proportion equation
68,724.76 : 103,135.80 = 31,289.68 : x - Step 2: Convert to fraction form
68,724.76/103,135.80 = 31,289.68/x - Step 3: Cross multiply
68,724.76x = 103,135.80 × 31,289.68 - Step 4: Simplify right side
68,724.76x = 3,227,086,178.54 - Step 5: Solve for x
x = 3,227,086,178.54/68,724.76 - Step 6: Final answer
x = 46,956.67
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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.