Finding the Fourth Proportional to 138,634.21, 191,314.24 and 74,971.09
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Solution
The fourth proportional to 138,634.21, 191,314.24 and 74,971.09 is: 103,459.58
Step by Step Solution
- Step 1: Write the proportion equation
138,634.21 : 191,314.24 = 74,971.09 : x - Step 2: Convert to fraction form
138,634.21/191,314.24 = 74,971.09/x - Step 3: Cross multiply
138,634.21x = 191,314.24 × 74,971.09 - Step 4: Simplify right side
138,634.21x = 14,343,037,105.32 - Step 5: Solve for x
x = 14,343,037,105.32/138,634.21 - Step 6: Final answer
x = 103,459.58
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1.5x scale
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.