Finding the Fourth Proportional to 71,281.04, 106,911.84 and 18,686.12
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Solution
The fourth proportional to 71,281.04, 106,911.84 and 18,686.12 is: 28,026.63
Step by Step Solution
- Step 1: Write the proportion equation
71,281.04 : 106,911.84 = 18,686.12 : x - Step 2: Convert to fraction form
71,281.04/106,911.84 = 18,686.12/x - Step 3: Cross multiply
71,281.04x = 106,911.84 × 18,686.12 - Step 4: Simplify right side
71,281.04x = 1,997,767,471.66 - Step 5: Solve for x
x = 1,997,767,471.66/71,281.04 - Step 6: Final answer
x = 28,026.63
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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.