Finding the Fourth Proportional to 138,129.27, 190,635.26 and 77,702.46
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Solution
The fourth proportional to 138,129.27, 190,635.26 and 77,702.46 is: 107,238.88
Step by Step Solution
- Step 1: Write the proportion equation
138,129.27 : 190,635.26 = 77,702.46 : x - Step 2: Convert to fraction form
138,129.27/190,635.26 = 77,702.46/x - Step 3: Cross multiply
138,129.27x = 190,635.26 × 77,702.46 - Step 4: Simplify right side
138,129.27x = 14,812,828,276.23 - Step 5: Solve for x
x = 14,812,828,276.23/138,129.27 - Step 6: Final answer
x = 107,238.88
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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.