Finding the Fourth Proportional to 71,130.78, 106,701.64 and 21,206.97
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Solution
The fourth proportional to 71,130.78, 106,701.64 and 21,206.97 is: 31,812.09
Step by Step Solution
- Step 1: Write the proportion equation
71,130.78 : 106,701.64 = 21,206.97 : x - Step 2: Convert to fraction form
71,130.78/106,701.64 = 21,206.97/x - Step 3: Cross multiply
71,130.78x = 106,701.64 × 21,206.97 - Step 4: Simplify right side
71,130.78x = 2,262,818,425.41 - Step 5: Solve for x
x = 2,262,818,425.41/71,130.78 - Step 6: Final answer
x = 31,812.09
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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.