Finding the Fourth Proportional to 87,415.20, 131,122.80 and 51,985.80
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Solution
The fourth proportional to 87,415.20, 131,122.80 and 51,985.80 is: 77,978.70
Step by Step Solution
- Step 1: Write the proportion equation
87,415.20 : 131,122.80 = 51,985.80 : x - Step 2: Convert to fraction form
87,415.20/131,122.80 = 51,985.80/x - Step 3: Cross multiply
87,415.20x = 131,122.80 × 51,985.80 - Step 4: Simplify right side
87,415.20x = 6,816,523,656.24 - Step 5: Solve for x
x = 6,816,523,656.24/87,415.20 - Step 6: Final answer
x = 77,978.70
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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.