Finding the Fourth Proportional to 78,471.90, 108,288.84 and 42,660.99
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Solution
The fourth proportional to 78,471.90, 108,288.84 and 42,660.99 is: 58,870.87
Step by Step Solution
- Step 1: Write the proportion equation
78,471.90 : 108,288.84 = 42,660.99 : x - Step 2: Convert to fraction form
78,471.90/108,288.84 = 42,660.99/x - Step 3: Cross multiply
78,471.90x = 108,288.84 × 42,660.99 - Step 4: Simplify right side
78,471.90x = 4,619,709,120.35 - Step 5: Solve for x
x = 4,619,709,120.35/78,471.90 - Step 6: Final answer
x = 58,870.87
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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.