Finding the Fourth Proportional to 77,431.93, 106,742.96 and 54,730.87
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Solution
The fourth proportional to 77,431.93, 106,742.96 and 54,730.87 is: 75,448.66
Step by Step Solution
- Step 1: Write the proportion equation
77,431.93 : 106,742.96 = 54,730.87 : x - Step 2: Convert to fraction form
77,431.93/106,742.96 = 54,730.87/x - Step 3: Cross multiply
77,431.93x = 106,742.96 × 54,730.87 - Step 4: Simplify right side
77,431.93x = 5,842,135,067.18 - Step 5: Solve for x
x = 5,842,135,067.18/77,431.93 - Step 6: Final answer
x = 75,448.66
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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.