Finding the Fourth Proportional to 68,635.81, 102,929.60 and 20,590.09
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Solution
The fourth proportional to 68,635.81, 102,929.60 and 20,590.09 is: 30,877.90
Step by Step Solution
- Step 1: Write the proportion equation
68,635.81 : 102,929.60 = 20,590.09 : x - Step 2: Convert to fraction form
68,635.81/102,929.60 = 20,590.09/x - Step 3: Cross multiply
68,635.81x = 102,929.60 × 20,590.09 - Step 4: Simplify right side
68,635.81x = 2,119,329,941.56 - Step 5: Solve for x
x = 2,119,329,941.56/68,635.81 - Step 6: Final answer
x = 30,877.90
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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.