Finding the Fourth Proportional to 113,905.08, 157,159.02 and 78,106.20
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Solution
The fourth proportional to 113,905.08, 157,159.02 and 78,106.20 is: 107,765.99
Step by Step Solution
- Step 1: Write the proportion equation
113,905.08 : 157,159.02 = 78,106.20 : x - Step 2: Convert to fraction form
113,905.08/157,159.02 = 78,106.20/x - Step 3: Cross multiply
113,905.08x = 157,159.02 × 78,106.20 - Step 4: Simplify right side
113,905.08x = 12,275,093,847.92 - Step 5: Solve for x
x = 12,275,093,847.92/113,905.08 - Step 6: Final answer
x = 107,765.99
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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.