Finding the Fourth Proportional to 68,518.98, 102,789.56 and 21,122.99
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Solution
The fourth proportional to 68,518.98, 102,789.56 and 21,122.99 is: 31,687.89
Step by Step Solution
- Step 1: Write the proportion equation
68,518.98 : 102,789.56 = 21,122.99 : x - Step 2: Convert to fraction form
68,518.98/102,789.56 = 21,122.99/x - Step 3: Cross multiply
68,518.98x = 102,789.56 × 21,122.99 - Step 4: Simplify right side
68,518.98x = 2,171,222,228.42 - Step 5: Solve for x
x = 2,171,222,228.42/68,518.98 - Step 6: Final answer
x = 31,687.89
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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.