Finding the Fourth Proportional to 103,438.40, 142,760.64 and 63,175.68
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Solution
The fourth proportional to 103,438.40, 142,760.64 and 63,175.68 is: 87,192.00
Step by Step Solution
- Step 1: Write the proportion equation
103,438.40 : 142,760.64 = 63,175.68 : x - Step 2: Convert to fraction form
103,438.40/142,760.64 = 63,175.68/x - Step 3: Cross multiply
103,438.40x = 142,760.64 × 63,175.68 - Step 4: Simplify right side
103,438.40x = 9,019,000,509.24 - Step 5: Solve for x
x = 9,019,000,509.24/103,438.40 - Step 6: Final answer
x = 87,192.00
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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.