Finding the Fourth Proportional to 81,840.99, 122,760.99 and 21,051.17
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Solution
The fourth proportional to 81,840.99, 122,760.99 and 21,051.17 is: 31,576.62
Step by Step Solution
- Step 1: Write the proportion equation
81,840.99 : 122,760.99 = 21,051.17 : x - Step 2: Convert to fraction form
81,840.99/122,760.99 = 21,051.17/x - Step 3: Cross multiply
81,840.99x = 122,760.99 × 21,051.17 - Step 4: Simplify right side
81,840.99x = 2,584,261,856.05 - Step 5: Solve for x
x = 2,584,261,856.05/81,840.99 - Step 6: Final answer
x = 31,576.62
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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.