Finding the Fourth Proportional to 85,420.44, 128,069.10 and 52,132.68
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Solution
The fourth proportional to 85,420.44, 128,069.10 and 52,132.68 is: 78,161.45
Step by Step Solution
- Step 1: Write the proportion equation
85,420.44 : 128,069.10 = 52,132.68 : x - Step 2: Convert to fraction form
85,420.44/128,069.10 = 52,132.68/x - Step 3: Cross multiply
85,420.44x = 128,069.10 × 52,132.68 - Step 4: Simplify right side
85,420.44x = 6,676,585,408.19 - Step 5: Solve for x
x = 6,676,585,408.19/85,420.44 - Step 6: Final answer
x = 78,161.45
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1.5x scale
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.