Finding the Fourth Proportional to 142,418.68, 196,528.08 and 78,755.92
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Solution
The fourth proportional to 142,418.68, 196,528.08 and 78,755.92 is: 108,677.81
Step by Step Solution
- Step 1: Write the proportion equation
142,418.68 : 196,528.08 = 78,755.92 : x - Step 2: Convert to fraction form
142,418.68/196,528.08 = 78,755.92/x - Step 3: Cross multiply
142,418.68x = 196,528.08 × 78,755.92 - Step 4: Simplify right side
142,418.68x = 15,477,749,746.23 - Step 5: Solve for x
x = 15,477,749,746.23/142,418.68 - Step 6: Final answer
x = 108,677.81
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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.