Finding the Fourth Proportional to 138,508.81, 207,769.58 and 42,439.14
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Solution
The fourth proportional to 138,508.81, 207,769.58 and 42,439.14 is: 63,660.66
Step by Step Solution
- Step 1: Write the proportion equation
138,508.81 : 207,769.58 = 42,439.14 : x - Step 2: Convert to fraction form
138,508.81/207,769.58 = 42,439.14/x - Step 3: Cross multiply
138,508.81x = 207,769.58 × 42,439.14 - Step 4: Simplify right side
138,508.81x = 8,817,562,240.31 - Step 5: Solve for x
x = 8,817,562,240.31/138,508.81 - Step 6: Final answer
x = 63,660.66
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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.