Finding the Fourth Proportional to 129,453,190.12, 178,644,857.70 and 71,506,438.12
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Solution
The fourth proportional to 129,453,190.12, 178,644,857.70 and 71,506,438.12 is: 98,678,583.75
Step by Step Solution
- Step 1: Write the proportion equation
129,453,190.12 : 178,644,857.70 = 71,506,438.12 : x - Step 2: Convert to fraction form
129,453,190.12/178,644,857.70 = 71,506,438.12/x - Step 3: Cross multiply
129,453,190.12x = 178,644,857.70 × 71,506,438.12 - Step 4: Simplify right side
129,453,190.12x = 12,774,257,462,581,256 - Step 5: Solve for x
x = 12,774,257,462,581,256/129,453,190.12 - Step 6: Final answer
x = 98,678,583.75
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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.