Finding the Fourth Proportional to 87,119.12, 130,678.80 and 57,723.68
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Solution
The fourth proportional to 87,119.12, 130,678.80 and 57,723.68 is: 86,585.60
Step by Step Solution
- Step 1: Write the proportion equation
87,119.12 : 130,678.80 = 57,723.68 : x - Step 2: Convert to fraction form
87,119.12/130,678.80 = 57,723.68/x - Step 3: Cross multiply
87,119.12x = 130,678.80 × 57,723.68 - Step 4: Simplify right side
87,119.12x = 7,543,261,233.98 - Step 5: Solve for x
x = 7,543,261,233.98/87,119.12 - Step 6: Final answer
x = 86,585.60
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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.