Finding the Fourth Proportional to 113,912.20, 157,265.98 and 78,154.75
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Solution
The fourth proportional to 113,912.20, 157,265.98 and 78,154.75 is: 107,899.62
Step by Step Solution
- Step 1: Write the proportion equation
113,912.20 : 157,265.98 = 78,154.75 : x - Step 2: Convert to fraction form
113,912.20/157,265.98 = 78,154.75/x - Step 3: Cross multiply
113,912.20x = 157,265.98 × 78,154.75 - Step 4: Simplify right side
113,912.20x = 12,291,083,350.41 - Step 5: Solve for x
x = 12,291,083,350.41/113,912.20 - Step 6: Final answer
x = 107,899.62
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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.