Finding the Fourth Proportional to 86,544.30, 129,852.90 and 47,129.70
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Solution
The fourth proportional to 86,544.30, 129,852.90 and 47,129.70 is: 70,714.40
Step by Step Solution
- Step 1: Write the proportion equation
86,544.30 : 129,852.90 = 47,129.70 : x - Step 2: Convert to fraction form
86,544.30/129,852.90 = 47,129.70/x - Step 3: Cross multiply
86,544.30x = 129,852.90 × 47,129.70 - Step 4: Simplify right side
86,544.30x = 6,119,928,221.13 - Step 5: Solve for x
x = 6,119,928,221.13/86,544.30 - Step 6: Final answer
x = 70,714.40
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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.