Finding the Fourth Proportional to 100,702.30, 138,965.99 and 55,380.14
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Solution
The fourth proportional to 100,702.30, 138,965.99 and 55,380.14 is: 76,422.84
Step by Step Solution
- Step 1: Write the proportion equation
100,702.30 : 138,965.99 = 55,380.14 : x - Step 2: Convert to fraction form
100,702.30/138,965.99 = 55,380.14/x - Step 3: Cross multiply
100,702.30x = 138,965.99 × 55,380.14 - Step 4: Simplify right side
100,702.30x = 7,695,955,842.34 - Step 5: Solve for x
x = 7,695,955,842.34/100,702.30 - Step 6: Final answer
x = 76,422.84
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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.