Finding the Fourth Proportional to 81,618.08, 122,447.79 and 39,518.33
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Solution
The fourth proportional to 81,618.08, 122,447.79 and 39,518.33 is: 59,287.50
Step by Step Solution
- Step 1: Write the proportion equation
81,618.08 : 122,447.79 = 39,518.33 : x - Step 2: Convert to fraction form
81,618.08/122,447.79 = 39,518.33/x - Step 3: Cross multiply
81,618.08x = 122,447.79 × 39,518.33 - Step 4: Simplify right side
81,618.08x = 4,838,931,560.75 - Step 5: Solve for x
x = 4,838,931,560.75/81,618.08 - Step 6: Final answer
x = 59,287.50
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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.