Finding the Fourth Proportional to 128,644.10, 193,009.95 and 81,204.02
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Solution
The fourth proportional to 128,644.10, 193,009.95 and 81,204.02 is: 121,833.68
Step by Step Solution
- Step 1: Write the proportion equation
128,644.10 : 193,009.95 = 81,204.02 : x - Step 2: Convert to fraction form
128,644.10/193,009.95 = 81,204.02/x - Step 3: Cross multiply
128,644.10x = 193,009.95 × 81,204.02 - Step 4: Simplify right side
128,644.10x = 15,673,183,840.00 - Step 5: Solve for x
x = 15,673,183,840.00/128,644.10 - Step 6: Final answer
x = 121,833.68
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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.