Finding the Fourth Proportional to 81,340.05, 122,028.30 and 31,415.70
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Solution
The fourth proportional to 81,340.05, 122,028.30 and 31,415.70 is: 47,130.59
Step by Step Solution
- Step 1: Write the proportion equation
81,340.05 : 122,028.30 = 31,415.70 : x - Step 2: Convert to fraction form
81,340.05/122,028.30 = 31,415.70/x - Step 3: Cross multiply
81,340.05x = 122,028.30 × 31,415.70 - Step 4: Simplify right side
81,340.05x = 3,833,604,464.31 - Step 5: Solve for x
x = 3,833,604,464.31/81,340.05 - Step 6: Final answer
x = 47,130.59
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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.