Finding the Fourth Proportional to 141,905.08, 195,830.32 and 78,245.12
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Solution
The fourth proportional to 141,905.08, 195,830.32 and 78,245.12 is: 107,978.99
Step by Step Solution
- Step 1: Write the proportion equation
141,905.08 : 195,830.32 = 78,245.12 : x - Step 2: Convert to fraction form
141,905.08/195,830.32 = 78,245.12/x - Step 3: Cross multiply
141,905.08x = 195,830.32 × 78,245.12 - Step 4: Simplify right side
141,905.08x = 15,322,766,888.04 - Step 5: Solve for x
x = 15,322,766,888.04/141,905.08 - Step 6: Final answer
x = 107,978.99
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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.