Finding the Fourth Proportional to 72,129,137.16, 99,540,616.50 and 39,534,172.68
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Solution
The fourth proportional to 72,129,137.16, 99,540,616.50 and 39,534,172.68 is: 54,558,477.70
Step by Step Solution
- Step 1: Write the proportion equation
72,129,137.16 : 99,540,616.50 = 39,534,172.68 : x - Step 2: Convert to fraction form
72,129,137.16/99,540,616.50 = 39,534,172.68/x - Step 3: Cross multiply
72,129,137.16x = 99,540,616.50 × 39,534,172.68 - Step 4: Simplify right side
72,129,137.16x = 3,935,255,921,384,657 - Step 5: Solve for x
x = 3,935,255,921,384,657/72,129,137.16 - Step 6: Final answer
x = 54,558,477.70
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.