Finding the Fourth Proportional to 143,679.42, 198,269.80 and 79,136.09
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Solution
The fourth proportional to 143,679.42, 198,269.80 and 79,136.09 is: 109,203.51
Step by Step Solution
- Step 1: Write the proportion equation
143,679.42 : 198,269.80 = 79,136.09 : x - Step 2: Convert to fraction form
143,679.42/198,269.80 = 79,136.09/x - Step 3: Cross multiply
143,679.42x = 198,269.80 × 79,136.09 - Step 4: Simplify right side
143,679.42x = 15,690,297,294.18 - Step 5: Solve for x
x = 15,690,297,294.18/143,679.42 - Step 6: Final answer
x = 109,203.51
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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.