Finding the Fourth Proportional to 71,277.30, 106,921.71 and 18,686.63
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Solution
The fourth proportional to 71,277.30, 106,921.71 and 18,686.63 is: 28,031.45
Step by Step Solution
- Step 1: Write the proportion equation
71,277.30 : 106,921.71 = 18,686.63 : x - Step 2: Convert to fraction form
71,277.30/106,921.71 = 18,686.63/x - Step 3: Cross multiply
71,277.30x = 106,921.71 × 18,686.63 - Step 4: Simplify right side
71,277.30x = 1,998,005,899.13 - Step 5: Solve for x
x = 1,998,005,899.13/71,277.30 - Step 6: Final answer
x = 28,031.45
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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.