Finding the Fourth Proportional to 99,431.20, 137,154.90 and 63,608.68
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Solution
The fourth proportional to 99,431.20, 137,154.90 and 63,608.68 is: 87,741.50
Step by Step Solution
- Step 1: Write the proportion equation
99,431.20 : 137,154.90 = 63,608.68 : x - Step 2: Convert to fraction form
99,431.20/137,154.90 = 63,608.68/x - Step 3: Cross multiply
99,431.20x = 137,154.90 × 63,608.68 - Step 4: Simplify right side
99,431.20x = 8,724,242,144.53 - Step 5: Solve for x
x = 8,724,242,144.53/99,431.20 - Step 6: Final answer
x = 87,741.50
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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.