Finding the Fourth Proportional to 89,072.80, 122,861.28 and 57,281.92
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Solution
The fourth proportional to 89,072.80, 122,861.28 and 57,281.92 is: 79,010.99
Step by Step Solution
- Step 1: Write the proportion equation
89,072.80 : 122,861.28 = 57,281.92 : x - Step 2: Convert to fraction form
89,072.80/122,861.28 = 57,281.92/x - Step 3: Cross multiply
89,072.80x = 122,861.28 × 57,281.92 - Step 4: Simplify right side
89,072.80x = 7,037,730,012.06 - Step 5: Solve for x
x = 7,037,730,012.06/89,072.80 - Step 6: Final answer
x = 79,010.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.