Finding the Fourth Proportional to 142,647.21, 196,853.15 and 78,984.99
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Solution
The fourth proportional to 142,647.21, 196,853.15 and 78,984.99 is: 108,999.28
Step by Step Solution
- Step 1: Write the proportion equation
142,647.21 : 196,853.15 = 78,984.99 : x - Step 2: Convert to fraction form
142,647.21/196,853.15 = 78,984.99/x - Step 3: Cross multiply
142,647.21x = 196,853.15 × 78,984.99 - Step 4: Simplify right side
142,647.21x = 15,548,443,689.29 - Step 5: Solve for x
x = 15,548,443,689.29/142,647.21 - Step 6: Final answer
x = 108,999.28
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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.