Finding the Fourth Proportional to 259,757.40, 389,639.94 and 72,757.08
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Solution
The fourth proportional to 259,757.40, 389,639.94 and 72,757.08 is: 109,136.70
Step by Step Solution
- Step 1: Write the proportion equation
259,757.40 : 389,639.94 = 72,757.08 : x - Step 2: Convert to fraction form
259,757.40/389,639.94 = 72,757.08/x - Step 3: Cross multiply
259,757.40x = 389,639.94 × 72,757.08 - Step 4: Simplify right side
259,757.40x = 28,349,064,285.78 - Step 5: Solve for x
x = 28,349,064,285.78/259,757.40 - Step 6: Final answer
x = 109,136.70
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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.