Finding the Fourth Proportional to 100,257.29, 138,349.78 and 57,235.08
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Solution
The fourth proportional to 100,257.29, 138,349.78 and 57,235.08 is: 78,981.40
Step by Step Solution
- Step 1: Write the proportion equation
100,257.29 : 138,349.78 = 57,235.08 : x - Step 2: Convert to fraction form
100,257.29/138,349.78 = 57,235.08/x - Step 3: Cross multiply
100,257.29x = 138,349.78 × 57,235.08 - Step 4: Simplify right side
100,257.29x = 7,918,460,440.11 - Step 5: Solve for x
x = 7,918,460,440.11/100,257.29 - Step 6: Final answer
x = 78,981.40
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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.