Finding the Fourth Proportional to 68,289.96, 102,450.12 and 20,911.68
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Solution
The fourth proportional to 68,289.96, 102,450.12 and 20,911.68 is: 31,372.17
Step by Step Solution
- Step 1: Write the proportion equation
68,289.96 : 102,450.12 = 20,911.68 : x - Step 2: Convert to fraction form
68,289.96/102,450.12 = 20,911.68/x - Step 3: Cross multiply
68,289.96x = 102,450.12 × 20,911.68 - Step 4: Simplify right side
68,289.96x = 2,142,404,125.40 - Step 5: Solve for x
x = 2,142,404,125.40/68,289.96 - Step 6: Final answer
x = 31,372.17
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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.