Finding the Fourth Proportional to 71,272.60, 106,909.35 and 18,681.63
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Solution
The fourth proportional to 71,272.60, 106,909.35 and 18,681.63 is: 28,022.56
Step by Step Solution
- Step 1: Write the proportion equation
71,272.60 : 106,909.35 = 18,681.63 : x - Step 2: Convert to fraction form
71,272.60/106,909.35 = 18,681.63/x - Step 3: Cross multiply
71,272.60x = 106,909.35 × 18,681.63 - Step 4: Simplify right side
71,272.60x = 1,997,240,920.24 - Step 5: Solve for x
x = 1,997,240,920.24/71,272.60 - Step 6: Final answer
x = 28,022.56
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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.