Finding the Fourth Proportional to 79,289.60, 109,419.36 and 43,478.68
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Solution
The fourth proportional to 79,289.60, 109,419.36 and 43,478.68 is: 60,000.42
Step by Step Solution
- Step 1: Write the proportion equation
79,289.60 : 109,419.36 = 43,478.68 : x - Step 2: Convert to fraction form
79,289.60/109,419.36 = 43,478.68/x - Step 3: Cross multiply
79,289.60x = 109,419.36 × 43,478.68 - Step 4: Simplify right side
79,289.60x = 4,757,409,339.24 - Step 5: Solve for x
x = 4,757,409,339.24/79,289.60 - Step 6: Final answer
x = 60,000.42
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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.