Finding the Fourth Proportional to 87,112.99, 120,171.66 and 56,915.99
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Solution
The fourth proportional to 87,112.99, 120,171.66 and 56,915.99 is: 78,515.15
Step by Step Solution
- Step 1: Write the proportion equation
87,112.99 : 120,171.66 = 56,915.99 : x - Step 2: Convert to fraction form
87,112.99/120,171.66 = 56,915.99/x - Step 3: Cross multiply
87,112.99x = 120,171.66 × 56,915.99 - Step 4: Simplify right side
87,112.99x = 6,839,689,373.37 - Step 5: Solve for x
x = 6,839,689,373.37/87,112.99 - Step 6: Final answer
x = 78,515.15
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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.