Finding the Fourth Proportional to 85,391.56, 128,104.62 and 29,991.88
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Solution
The fourth proportional to 85,391.56, 128,104.62 and 29,991.88 is: 44,993.89
Step by Step Solution
- Step 1: Write the proportion equation
85,391.56 : 128,104.62 = 29,991.88 : x - Step 2: Convert to fraction form
85,391.56/128,104.62 = 29,991.88/x - Step 3: Cross multiply
85,391.56x = 128,104.62 × 29,991.88 - Step 4: Simplify right side
85,391.56x = 3,842,098,390.49 - Step 5: Solve for x
x = 3,842,098,390.49/85,391.56 - Step 6: Final answer
x = 44,993.89
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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.