Finding the Fourth Proportional to 87,115.99, 120,175.80 and 56,918.99
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Solution
The fourth proportional to 87,115.99, 120,175.80 and 56,918.99 is: 78,519.28
Step by Step Solution
- Step 1: Write the proportion equation
87,115.99 : 120,175.80 = 56,918.99 : x - Step 2: Convert to fraction form
87,115.99/120,175.80 = 56,918.99/x - Step 3: Cross multiply
87,115.99x = 120,175.80 × 56,918.99 - Step 4: Simplify right side
87,115.99x = 6,840,285,158.44 - Step 5: Solve for x
x = 6,840,285,158.44/87,115.99 - Step 6: Final answer
x = 78,519.28
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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.