Finding the Fourth Proportional to 138,046.32, 190,503.18 and 77,617.08
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Solution
The fourth proportional to 138,046.32, 190,503.18 and 77,617.08 is: 107,111.15
Step by Step Solution
- Step 1: Write the proportion equation
138,046.32 : 190,503.18 = 77,617.08 : x - Step 2: Convert to fraction form
138,046.32/190,503.18 = 77,617.08/x - Step 3: Cross multiply
138,046.32x = 190,503.18 × 77,617.08 - Step 4: Simplify right side
138,046.32x = 14,786,300,562.31 - Step 5: Solve for x
x = 14,786,300,562.31/138,046.32 - Step 6: Final answer
x = 107,111.15
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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.