Finding the Fourth Proportional to 138,251.13, 190,790.12 and 77,823.93
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Solution
The fourth proportional to 138,251.13, 190,790.12 and 77,823.93 is: 107,399.02
Step by Step Solution
- Step 1: Write the proportion equation
138,251.13 : 190,790.12 = 77,823.93 : x - Step 2: Convert to fraction form
138,251.13/190,790.12 = 77,823.93/x - Step 3: Cross multiply
138,251.13x = 190,790.12 × 77,823.93 - Step 4: Simplify right side
138,251.13x = 14,848,036,554.45 - Step 5: Solve for x
x = 14,848,036,554.45/138,251.13 - Step 6: Final answer
x = 107,399.02
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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.