Finding the Fourth Proportional to 12,128,112.30, 18,192,168.45 and 8,709,175.20
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Solution
The fourth proportional to 12,128,112.30, 18,192,168.45 and 8,709,175.20 is: 13,063,762.80
Step by Step Solution
- Step 1: Write the proportion equation
12,128,112.30 : 18,192,168.45 = 8,709,175.20 : x - Step 2: Convert to fraction form
12,128,112.30/18,192,168.45 = 8,709,175.20/x - Step 3: Cross multiply
12,128,112.30x = 18,192,168.45 × 8,709,175.20 - Step 4: Simplify right side
12,128,112.30x = 158,438,782,298,962.41 - Step 5: Solve for x
x = 158,438,782,298,962.41/12,128,112.30 - Step 6: Final answer
x = 13,063,762.80
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1.5x scale
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.