Finding the Fourth Proportional to 100,395.78, 138,549.99 and 55,075.66
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Solution
The fourth proportional to 100,395.78, 138,549.99 and 55,075.66 is: 76,006.50
Step by Step Solution
- Step 1: Write the proportion equation
100,395.78 : 138,549.99 = 55,075.66 : x - Step 2: Convert to fraction form
100,395.78/138,549.99 = 55,075.66/x - Step 3: Cross multiply
100,395.78x = 138,549.99 × 55,075.66 - Step 4: Simplify right side
100,395.78x = 7,630,732,142.24 - Step 5: Solve for x
x = 7,630,732,142.24/100,395.78 - Step 6: Final answer
x = 76,006.50
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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.