Finding the Fourth Proportional to 87,813.84, 131,720.75 and 21,253.97
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Solution
The fourth proportional to 87,813.84, 131,720.75 and 21,253.97 is: 31,880.95
Step by Step Solution
- Step 1: Write the proportion equation
87,813.84 : 131,720.75 = 21,253.97 : x - Step 2: Convert to fraction form
87,813.84/131,720.75 = 21,253.97/x - Step 3: Cross multiply
87,813.84x = 131,720.75 × 21,253.97 - Step 4: Simplify right side
87,813.84x = 2,799,588,263.41 - Step 5: Solve for x
x = 2,799,588,263.41/87,813.84 - Step 6: Final answer
x = 31,880.95
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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.