Finding the Fourth Proportional to 86,454.90, 129,686.40 and 42,028.68
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Solution
The fourth proportional to 86,454.90, 129,686.40 and 42,028.68 is: 63,044.99
Step by Step Solution
- Step 1: Write the proportion equation
86,454.90 : 129,686.40 = 42,028.68 : x - Step 2: Convert to fraction form
86,454.90/129,686.40 = 42,028.68/x - Step 3: Cross multiply
86,454.90x = 129,686.40 × 42,028.68 - Step 4: Simplify right side
86,454.90x = 5,450,548,205.95 - Step 5: Solve for x
x = 5,450,548,205.95/86,454.90 - Step 6: Final answer
x = 63,044.99
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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.