Finding the Fourth Proportional to 76,929.21, 115,393.95 and 31,949.91
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Solution
The fourth proportional to 76,929.21, 115,393.95 and 31,949.91 is: 47,924.92
Step by Step Solution
- Step 1: Write the proportion equation
76,929.21 : 115,393.95 = 31,949.91 : x - Step 2: Convert to fraction form
76,929.21/115,393.95 = 31,949.91/x - Step 3: Cross multiply
76,929.21x = 115,393.95 × 31,949.91 - Step 4: Simplify right side
76,929.21x = 3,686,826,317.04 - Step 5: Solve for x
x = 3,686,826,317.04/76,929.21 - Step 6: Final answer
x = 47,924.92
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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.