Finding the Fourth Proportional to 135,421.80, 186,879.77 and 74,991.14
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Solution
The fourth proportional to 135,421.80, 186,879.77 and 74,991.14 is: 103,486.49
Step by Step Solution
- Step 1: Write the proportion equation
135,421.80 : 186,879.77 = 74,991.14 : x - Step 2: Convert to fraction form
135,421.80/186,879.77 = 74,991.14/x - Step 3: Cross multiply
135,421.80x = 186,879.77 × 74,991.14 - Step 4: Simplify right side
135,421.80x = 14,014,326,995.24 - Step 5: Solve for x
x = 14,014,326,995.24/135,421.80 - Step 6: Final answer
x = 103,486.49
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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.