Finding the Fourth Proportional to 81,805.68, 122,608.08 and 42,340.32
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Solution
The fourth proportional to 81,805.68, 122,608.08 and 42,340.32 is: 63,458.50
Step by Step Solution
- Step 1: Write the proportion equation
81,805.68 : 122,608.08 = 42,340.32 : x - Step 2: Convert to fraction form
81,805.68/122,608.08 = 42,340.32/x - Step 3: Cross multiply
81,805.68x = 122,608.08 × 42,340.32 - Step 4: Simplify right side
81,805.68x = 5,191,265,341.79 - Step 5: Solve for x
x = 5,191,265,341.79/81,805.68 - Step 6: Final answer
x = 63,458.50
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.