Finding the Fourth Proportional to 81,319.68, 121,979.52 and 34,539.84
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Solution
The fourth proportional to 81,319.68, 121,979.52 and 34,539.84 is: 51,809.76
Step by Step Solution
- Step 1: Write the proportion equation
81,319.68 : 121,979.52 = 34,539.84 : x - Step 2: Convert to fraction form
81,319.68/121,979.52 = 34,539.84/x - Step 3: Cross multiply
81,319.68x = 121,979.52 × 34,539.84 - Step 4: Simplify right side
81,319.68x = 4,213,153,104.08 - Step 5: Solve for x
x = 4,213,153,104.08/81,319.68 - Step 6: Final answer
x = 51,809.76
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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.