Finding the Fourth Proportional to 81,203.70, 121,805.55 and 39,731.70
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Solution
The fourth proportional to 81,203.70, 121,805.55 and 39,731.70 is: 59,597.55
Step by Step Solution
- Step 1: Write the proportion equation
81,203.70 : 121,805.55 = 39,731.70 : x - Step 2: Convert to fraction form
81,203.70/121,805.55 = 39,731.70/x - Step 3: Cross multiply
81,203.70x = 121,805.55 × 39,731.70 - Step 4: Simplify right side
81,203.70x = 4,839,541,570.94 - Step 5: Solve for x
x = 4,839,541,570.94/81,203.70 - Step 6: Final answer
x = 59,597.55
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1.5x scale
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.