Finding the Fourth Proportional to 79,451.40, 109,639.99 and 43,639.28
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Solution
The fourth proportional to 79,451.40, 109,639.99 and 43,639.28 is: 60,220.59
Step by Step Solution
- Step 1: Write the proportion equation
79,451.40 : 109,639.99 = 43,639.28 : x - Step 2: Convert to fraction form
79,451.40/109,639.99 = 43,639.28/x - Step 3: Cross multiply
79,451.40x = 109,639.99 × 43,639.28 - Step 4: Simplify right side
79,451.40x = 4,784,610,140.31 - Step 5: Solve for x
x = 4,784,610,140.31/79,451.40 - Step 6: Final answer
x = 60,220.59
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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.