Finding the Fourth Proportional to 103,421.09, 142,721.03 and 58,709.09
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Solution
The fourth proportional to 103,421.09, 142,721.03 and 58,709.09 is: 81,018.50
Step by Step Solution
- Step 1: Write the proportion equation
103,421.09 : 142,721.03 = 58,709.09 : x - Step 2: Convert to fraction form
103,421.09/142,721.03 = 58,709.09/x - Step 3: Cross multiply
103,421.09x = 142,721.03 × 58,709.09 - Step 4: Simplify right side
103,421.09x = 8,379,021,501.62 - Step 5: Solve for x
x = 8,379,021,501.62/103,421.09 - Step 6: Final answer
x = 81,018.50
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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.