Finding the Fourth Proportional to 83,986.20, 125,979.30 and 79,903.80
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Solution
The fourth proportional to 83,986.20, 125,979.30 and 79,903.80 is: 119,855.70
Step by Step Solution
- Step 1: Write the proportion equation
83,986.20 : 125,979.30 = 79,903.80 : x - Step 2: Convert to fraction form
83,986.20/125,979.30 = 79,903.80/x - Step 3: Cross multiply
83,986.20x = 125,979.30 × 79,903.80 - Step 4: Simplify right side
83,986.20x = 10,066,224,791.34 - Step 5: Solve for x
x = 10,066,224,791.34/83,986.20 - Step 6: Final answer
x = 119,855.70
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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.