Finding the Fourth Proportional to 102,680.13, 142,423.50 and 99,949.08
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Solution
The fourth proportional to 102,680.13, 142,423.50 and 99,949.08 is: 138,635.37
Step by Step Solution
- Step 1: Write the proportion equation
102,680.13 : 142,423.50 = 99,949.08 : x - Step 2: Convert to fraction form
102,680.13/142,423.50 = 99,949.08/x - Step 3: Cross multiply
102,680.13x = 142,423.50 × 99,949.08 - Step 4: Simplify right side
102,680.13x = 14,235,097,795.38 - Step 5: Solve for x
x = 14,235,097,795.38/102,680.13 - Step 6: Final answer
x = 138,635.37
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.