Finding the Fourth Proportional to 128,946.36, 193,420.82 and 38,989.80
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Solution
The fourth proportional to 128,946.36, 193,420.82 and 38,989.80 is: 58,485.09
Step by Step Solution
- Step 1: Write the proportion equation
128,946.36 : 193,420.82 = 38,989.80 : x - Step 2: Convert to fraction form
128,946.36/193,420.82 = 38,989.80/x - Step 3: Cross multiply
128,946.36x = 193,420.82 × 38,989.80 - Step 4: Simplify right side
128,946.36x = 7,541,439,087.64 - Step 5: Solve for x
x = 7,541,439,087.64/128,946.36 - Step 6: Final answer
x = 58,485.09
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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.