Finding the Fourth Proportional to 83,515.20, 125,272.80 and 21,185.70
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Solution
The fourth proportional to 83,515.20, 125,272.80 and 21,185.70 is: 31,778.55
Step by Step Solution
- Step 1: Write the proportion equation
83,515.20 : 125,272.80 = 21,185.70 : x - Step 2: Convert to fraction form
83,515.20/125,272.80 = 21,185.70/x - Step 3: Cross multiply
83,515.20x = 125,272.80 × 21,185.70 - Step 4: Simplify right side
83,515.20x = 2,653,991,958.96 - Step 5: Solve for x
x = 2,653,991,958.96/83,515.20 - Step 6: Final answer
x = 31,778.55
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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.