Finding the Fourth Proportional to 78,576.66, 108,438.09 and 42,768.99
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Solution
The fourth proportional to 78,576.66, 108,438.09 and 42,768.99 is: 59,022.46
Step by Step Solution
- Step 1: Write the proportion equation
78,576.66 : 108,438.09 = 42,768.99 : x - Step 2: Convert to fraction form
78,576.66/108,438.09 = 42,768.99/x - Step 3: Cross multiply
78,576.66x = 108,438.09 × 42,768.99 - Step 4: Simplify right side
78,576.66x = 4,637,787,586.83 - Step 5: Solve for x
x = 4,637,787,586.83/78,576.66 - Step 6: Final answer
x = 59,022.46
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1.5x scale
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.