Finding the Fourth Proportional to 102,561.40, 153,842.10 and 86,231.80
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Solution
The fourth proportional to 102,561.40, 153,842.10 and 86,231.80 is: 129,347.70
Step by Step Solution
- Step 1: Write the proportion equation
102,561.40 : 153,842.10 = 86,231.80 : x - Step 2: Convert to fraction form
102,561.40/153,842.10 = 86,231.80/x - Step 3: Cross multiply
102,561.40x = 153,842.10 × 86,231.80 - Step 4: Simplify right side
102,561.40x = 13,266,081,198.78 - Step 5: Solve for x
x = 13,266,081,198.78/102,561.40 - Step 6: Final answer
x = 129,347.70
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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.