Finding the Fourth Proportional to 81,219.16, 121,884.09 and 48,788.68
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Solution
The fourth proportional to 81,219.16, 121,884.09 and 48,788.68 is: 73,216.27
Step by Step Solution
- Step 1: Write the proportion equation
81,219.16 : 121,884.09 = 48,788.68 : x - Step 2: Convert to fraction form
81,219.16/121,884.09 = 48,788.68/x - Step 3: Cross multiply
81,219.16x = 121,884.09 × 48,788.68 - Step 4: Simplify right side
81,219.16x = 5,946,563,879.40 - Step 5: Solve for x
x = 5,946,563,879.40/81,219.16 - Step 6: Final answer
x = 73,216.27
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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.