Finding the Fourth Proportional to 129,152.80, 193,539.66 and 91,784.80
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Solution
The fourth proportional to 129,152.80, 193,539.66 and 91,784.80 is: 137,542.50
Step by Step Solution
- Step 1: Write the proportion equation
129,152.80 : 193,539.66 = 91,784.80 : x - Step 2: Convert to fraction form
129,152.80/193,539.66 = 91,784.80/x - Step 3: Cross multiply
129,152.80x = 193,539.66 × 91,784.80 - Step 4: Simplify right side
129,152.80x = 17,763,998,985.17 - Step 5: Solve for x
x = 17,763,998,985.17/129,152.80 - Step 6: Final answer
x = 137,542.50
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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.