Finding the Fourth Proportional to 121,622.56, 182,422.70 and 86,235.68
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Solution
The fourth proportional to 121,622.56, 182,422.70 and 86,235.68 is: 129,345.62
Step by Step Solution
- Step 1: Write the proportion equation
121,622.56 : 182,422.70 = 86,235.68 : x - Step 2: Convert to fraction form
121,622.56/182,422.70 = 86,235.68/x - Step 3: Cross multiply
121,622.56x = 182,422.70 × 86,235.68 - Step 4: Simplify right side
121,622.56x = 15,731,345,581.94 - Step 5: Solve for x
x = 15,731,345,581.94/121,622.56 - Step 6: Final answer
x = 129,345.62
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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.