Finding the Fourth Proportional to 129,605.13, 194,407.69 and 31,109.13
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Solution
The fourth proportional to 129,605.13, 194,407.69 and 31,109.13 is: 46,663.69
Step by Step Solution
- Step 1: Write the proportion equation
129,605.13 : 194,407.69 = 31,109.13 : x - Step 2: Convert to fraction form
129,605.13/194,407.69 = 31,109.13/x - Step 3: Cross multiply
129,605.13x = 194,407.69 × 31,109.13 - Step 4: Simplify right side
129,605.13x = 6,047,854,101.21 - Step 5: Solve for x
x = 6,047,854,101.21/129,605.13 - Step 6: Final answer
x = 46,663.69
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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.