Finding the Fourth Proportional to 72,129,136.16, 99,540,615.12 and 39,534,171.68
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Solution
The fourth proportional to 72,129,136.16, 99,540,615.12 and 39,534,171.68 is: 54,558,476.32
Step by Step Solution
- Step 1: Write the proportion equation
72,129,136.16 : 99,540,615.12 = 39,534,171.68 : x - Step 2: Convert to fraction form
72,129,136.16/99,540,615.12 = 39,534,171.68/x - Step 3: Cross multiply
72,129,136.16x = 99,540,615.12 × 39,534,171.68 - Step 4: Simplify right side
72,129,136.16x = 3,935,255,767,286,884 - Step 5: Solve for x
x = 3,935,255,767,286,884/72,129,136.16 - Step 6: Final answer
x = 54,558,476.32
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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.