Finding the Fourth Proportional to 55,420, 76,479.60 and 30,269.56
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Solution
The fourth proportional to 55,420, 76,479.60 and 30,269.56 is: 41,771.99
Step by Step Solution
- Step 1: Write the proportion equation
55,420 : 76,479.60 = 30,269.56 : x - Step 2: Convert to fraction form
55,420/76,479.60 = 30,269.56/x - Step 3: Cross multiply
55,420x = 76,479.60 × 30,269.56 - Step 4: Simplify right side
55,420x = 2,315,003,840.98 - Step 5: Solve for x
x = 2,315,003,840.98/55,420 - Step 6: Final answer
x = 41,771.99
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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.