Finding the Fourth Proportional to 128,913.86, 193,172.99 and 53,993.00
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Solution
The fourth proportional to 128,913.86, 193,172.99 and 53,993.00 is: 80,906.66
Step by Step Solution
- Step 1: Write the proportion equation
128,913.86 : 193,172.99 = 53,993.00 : x - Step 2: Convert to fraction form
128,913.86/193,172.99 = 53,993.00/x - Step 3: Cross multiply
128,913.86x = 193,172.99 × 53,993.00 - Step 4: Simplify right side
128,913.86x = 10,429,989,462.04 - Step 5: Solve for x
x = 10,429,989,462.04/128,913.86 - Step 6: Final answer
x = 80,906.66
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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.