Finding the Fourth Proportional to 87,069.19, 120,147.09 and 48,830.31
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Solution
The fourth proportional to 87,069.19, 120,147.09 and 48,830.31 is: 67,381.12
Step by Step Solution
- Step 1: Write the proportion equation
87,069.19 : 120,147.09 = 48,830.31 : x - Step 2: Convert to fraction form
87,069.19/120,147.09 = 48,830.31/x - Step 3: Cross multiply
87,069.19x = 120,147.09 × 48,830.31 - Step 4: Simplify right side
87,069.19x = 5,866,819,650.30 - Step 5: Solve for x
x = 5,866,819,650.30/87,069.19 - Step 6: Final answer
x = 67,381.12
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1.5x scale
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.