Finding the Fourth Proportional to 81,420.12, 122,138.28 and 25,257.96
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Solution
The fourth proportional to 81,420.12, 122,138.28 and 25,257.96 is: 37,889.45
Step by Step Solution
- Step 1: Write the proportion equation
81,420.12 : 122,138.28 = 25,257.96 : x - Step 2: Convert to fraction form
81,420.12/122,138.28 = 25,257.96/x - Step 3: Cross multiply
81,420.12x = 122,138.28 × 25,257.96 - Step 4: Simplify right side
81,420.12x = 3,084,963,790.71 - Step 5: Solve for x
x = 3,084,963,790.71/81,420.12 - Step 6: Final answer
x = 37,889.45
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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.