Finding the Fourth Proportional to 128,802.60, 193,203.90 and 53,909.80
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Solution
The fourth proportional to 128,802.60, 193,203.90 and 53,909.80 is: 80,864.70
Step by Step Solution
- Step 1: Write the proportion equation
128,802.60 : 193,203.90 = 53,909.80 : x - Step 2: Convert to fraction form
128,802.60/193,203.90 = 53,909.80/x - Step 3: Cross multiply
128,802.60x = 193,203.90 × 53,909.80 - Step 4: Simplify right side
128,802.60x = 10,415,583,608.22 - Step 5: Solve for x
x = 10,415,583,608.22/128,802.60 - Step 6: Final answer
x = 80,864.70
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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.