Finding the Fourth Proportional to 143,878.21, 198,563.77 and 79,360.09
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Solution
The fourth proportional to 143,878.21, 198,563.77 and 79,360.09 is: 109,523.45
Step by Step Solution
- Step 1: Write the proportion equation
143,878.21 : 198,563.77 = 79,360.09 : x - Step 2: Convert to fraction form
143,878.21/198,563.77 = 79,360.09/x - Step 3: Cross multiply
143,878.21x = 198,563.77 × 79,360.09 - Step 4: Simplify right side
143,878.21x = 15,758,038,260.73 - Step 5: Solve for x
x = 15,758,038,260.73/143,878.21 - Step 6: Final answer
x = 109,523.45
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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.