Finding the Fourth Proportional to 86,990.96, 120,105.36 and 66,811.80
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Solution
The fourth proportional to 86,990.96, 120,105.36 and 66,811.80 is: 92,244.70
Step by Step Solution
- Step 1: Write the proportion equation
86,990.96 : 120,105.36 = 66,811.80 : x - Step 2: Convert to fraction form
86,990.96/120,105.36 = 66,811.80/x - Step 3: Cross multiply
86,990.96x = 120,105.36 × 66,811.80 - Step 4: Simplify right side
86,990.96x = 8,024,455,291.25 - Step 5: Solve for x
x = 8,024,455,291.25/86,990.96 - Step 6: Final answer
x = 92,244.70
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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.