Finding the Fourth Proportional to 155,977.12, 215,053.14 and 130,172.68
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Solution
The fourth proportional to 155,977.12, 215,053.14 and 130,172.68 is: 179,475.32
Step by Step Solution
- Step 1: Write the proportion equation
155,977.12 : 215,053.14 = 130,172.68 : x - Step 2: Convert to fraction form
155,977.12/215,053.14 = 130,172.68/x - Step 3: Cross multiply
155,977.12x = 215,053.14 × 130,172.68 - Step 4: Simplify right side
155,977.12x = 27,994,043,576.22 - Step 5: Solve for x
x = 27,994,043,576.22/155,977.12 - Step 6: Final answer
x = 179,475.32
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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.