Finding the Fourth Proportional to 128,079.99, 176,760.50 and 74,381.85
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Solution
The fourth proportional to 128,079.99, 176,760.50 and 74,381.85 is: 102,652.82
Step by Step Solution
- Step 1: Write the proportion equation
128,079.99 : 176,760.50 = 74,381.85 : x - Step 2: Convert to fraction form
128,079.99/176,760.50 = 74,381.85/x - Step 3: Cross multiply
128,079.99x = 176,760.50 × 74,381.85 - Step 4: Simplify right side
128,079.99x = 13,147,772,625.02 - Step 5: Solve for x
x = 13,147,772,625.02/128,079.99 - Step 6: Final answer
x = 102,652.82
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.