Finding the Fourth Proportional to 100,560.69, 138,774.64 and 55,239.59
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Solution
The fourth proportional to 100,560.69, 138,774.64 and 55,239.59 is: 76,231.12
Step by Step Solution
- Step 1: Write the proportion equation
100,560.69 : 138,774.64 = 55,239.59 : x - Step 2: Convert to fraction form
100,560.69/138,774.64 = 55,239.59/x - Step 3: Cross multiply
100,560.69x = 138,774.64 × 55,239.59 - Step 4: Simplify right side
100,560.69x = 7,665,853,730.96 - Step 5: Solve for x
x = 7,665,853,730.96/100,560.69 - Step 6: Final answer
x = 76,231.12
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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.