Finding the Fourth Proportional to 119,891.80, 165,349.11 and 72,136.23
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Solution
The fourth proportional to 119,891.80, 165,349.11 and 72,136.23 is: 99,486.88
Step by Step Solution
- Step 1: Write the proportion equation
119,891.80 : 165,349.11 = 72,136.23 : x - Step 2: Convert to fraction form
119,891.80/165,349.11 = 72,136.23/x - Step 3: Cross multiply
119,891.80x = 165,349.11 × 72,136.23 - Step 4: Simplify right side
119,891.80x = 11,927,661,429.26 - Step 5: Solve for x
x = 11,927,661,429.26/119,891.80 - Step 6: Final answer
x = 99,486.88
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.