Finding the Fourth Proportional to 142,636.02, 196,840.79 and 78,107.99
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Solution
The fourth proportional to 142,636.02, 196,840.79 and 78,107.99 is: 107,790.70
Step by Step Solution
- Step 1: Write the proportion equation
142,636.02 : 196,840.79 = 78,107.99 : x - Step 2: Convert to fraction form
142,636.02/196,840.79 = 78,107.99/x - Step 3: Cross multiply
142,636.02x = 196,840.79 × 78,107.99 - Step 4: Simplify right side
142,636.02x = 15,374,837,082.17 - Step 5: Solve for x
x = 15,374,837,082.17/142,636.02 - Step 6: Final answer
x = 107,790.70
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1.5x scale
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.