Finding the Fourth Proportional to 121,911.70, 182,511.15 and 86,919.70
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Solution
The fourth proportional to 121,911.70, 182,511.15 and 86,919.70 is: 130,125.45
Step by Step Solution
- Step 1: Write the proportion equation
121,911.70 : 182,511.15 = 86,919.70 : x - Step 2: Convert to fraction form
121,911.70/182,511.15 = 86,919.70/x - Step 3: Cross multiply
121,911.70x = 182,511.15 × 86,919.70 - Step 4: Simplify right side
121,911.70x = 15,863,814,404.66 - Step 5: Solve for x
x = 15,863,814,404.66/121,911.70 - Step 6: Final answer
x = 130,125.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.