Finding the Fourth Proportional to 72,129,138.16, 99,540,617.88 and 39,534,173.68
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Solution
The fourth proportional to 72,129,138.16, 99,540,617.88 and 39,534,173.68 is: 54,558,479.08
Step by Step Solution
- Step 1: Write the proportion equation
72,129,138.16 : 99,540,617.88 = 39,534,173.68 : x - Step 2: Convert to fraction form
72,129,138.16/99,540,617.88 = 39,534,173.68/x - Step 3: Cross multiply
72,129,138.16x = 99,540,617.88 × 39,534,173.68 - Step 4: Simplify right side
72,129,138.16x = 3,935,256,075,482,433 - Step 5: Solve for x
x = 3,935,256,075,482,433/72,129,138.16 - Step 6: Final answer
x = 54,558,479.08
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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.