Finding the Fourth Proportional to 87,942.11, 121,354.36 and 56,107.60
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Solution
The fourth proportional to 87,942.11, 121,354.36 and 56,107.60 is: 77,424.81
Step by Step Solution
- Step 1: Write the proportion equation
87,942.11 : 121,354.36 = 56,107.60 : x - Step 2: Convert to fraction form
87,942.11/121,354.36 = 56,107.60/x - Step 3: Cross multiply
87,942.11x = 121,354.36 × 56,107.60 - Step 4: Simplify right side
87,942.11x = 6,808,901,445.48 - Step 5: Solve for x
x = 6,808,901,445.48/87,942.11 - Step 6: Final answer
x = 77,424.81
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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.