Finding the Fourth Proportional to 139,847.68, 192,991.12 and 79,419.58
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Solution
The fourth proportional to 139,847.68, 192,991.12 and 79,419.58 is: 109,599.77
Step by Step Solution
- Step 1: Write the proportion equation
139,847.68 : 192,991.12 = 79,419.58 : x - Step 2: Convert to fraction form
139,847.68/192,991.12 = 79,419.58/x - Step 3: Cross multiply
139,847.68x = 192,991.12 × 79,419.58 - Step 4: Simplify right side
139,847.68x = 15,327,273,694.13 - Step 5: Solve for x
x = 15,327,273,694.13/139,847.68 - Step 6: Final answer
x = 109,599.77
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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.