Finding the Fourth Proportional to 138,090.33, 190,562.84 and 77,660.95
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Solution
The fourth proportional to 138,090.33, 190,562.84 and 77,660.95 is: 107,171.09
Step by Step Solution
- Step 1: Write the proportion equation
138,090.33 : 190,562.84 = 77,660.95 : x - Step 2: Convert to fraction form
138,090.33/190,562.84 = 77,660.95/x - Step 3: Cross multiply
138,090.33x = 190,562.84 × 77,660.95 - Step 4: Simplify right side
138,090.33x = 14,799,291,189.10 - Step 5: Solve for x
x = 14,799,291,189.10/138,090.33 - Step 6: Final answer
x = 107,171.09
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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.