Finding the Fourth Proportional to 81,870,491.09, 122,432,731.41 and 61,135,490.10
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Solution
The fourth proportional to 81,870,491.09, 122,432,731.41 and 61,135,490.10 is: 91,424,699.42
Step by Step Solution
- Step 1: Write the proportion equation
81,870,491.09 : 122,432,731.41 = 61,135,490.10 : x - Step 2: Convert to fraction form
81,870,491.09/122,432,731.41 = 61,135,490.10/x - Step 3: Cross multiply
81,870,491.09x = 122,432,731.41 × 61,135,490.10 - Step 4: Simplify right side
81,870,491.09x = 7,484,985,039,032,014 - Step 5: Solve for x
x = 7,484,985,039,032,014/81,870,491.09 - Step 6: Final answer
x = 91,424,699.42
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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.