Finding the Fourth Proportional to 138,352.30, 207,059.34 and 85,077.74
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Solution
The fourth proportional to 138,352.30, 207,059.34 and 85,077.74 is: 127,328.14
Step by Step Solution
- Step 1: Write the proportion equation
138,352.30 : 207,059.34 = 85,077.74 : x - Step 2: Convert to fraction form
138,352.30/207,059.34 = 85,077.74/x - Step 3: Cross multiply
138,352.30x = 207,059.34 × 85,077.74 - Step 4: Simplify right side
138,352.30x = 17,616,141,051.22 - Step 5: Solve for x
x = 17,616,141,051.22/138,352.30 - Step 6: Final answer
x = 127,328.14
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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.