Finding the Fourth Proportional to 87,143.40, 120,205.62 and 53,551.08
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Solution
The fourth proportional to 87,143.40, 120,205.62 and 53,551.08 is: 73,868.37
Step by Step Solution
- Step 1: Write the proportion equation
87,143.40 : 120,205.62 = 53,551.08 : x - Step 2: Convert to fraction form
87,143.40/120,205.62 = 53,551.08/x - Step 3: Cross multiply
87,143.40x = 120,205.62 × 53,551.08 - Step 4: Simplify right side
87,143.40x = 6,437,140,773.07 - Step 5: Solve for x
x = 6,437,140,773.07/87,143.40 - Step 6: Final answer
x = 73,868.37
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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.