Finding the Fourth Proportional to 138,884.62, 191,660.19 and 77,630.74
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Solution
The fourth proportional to 138,884.62, 191,660.19 and 77,630.74 is: 107,130.09
Step by Step Solution
- Step 1: Write the proportion equation
138,884.62 : 191,660.19 = 77,630.74 : x - Step 2: Convert to fraction form
138,884.62/191,660.19 = 77,630.74/x - Step 3: Cross multiply
138,884.62x = 191,660.19 × 77,630.74 - Step 4: Simplify right side
138,884.62x = 14,878,722,378.24 - Step 5: Solve for x
x = 14,878,722,378.24/138,884.62 - Step 6: Final answer
x = 107,130.09
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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.