Finding the Fourth Proportional to 103,756.32, 143,129.57 and 65,502.09
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Solution
The fourth proportional to 103,756.32, 143,129.57 and 65,502.09 is: 90,358.69
Step by Step Solution
- Step 1: Write the proportion equation
103,756.32 : 143,129.57 = 65,502.09 : x - Step 2: Convert to fraction form
103,756.32/143,129.57 = 65,502.09/x - Step 3: Cross multiply
103,756.32x = 143,129.57 × 65,502.09 - Step 4: Simplify right side
103,756.32x = 9,375,285,648.29 - Step 5: Solve for x
x = 9,375,285,648.29/103,756.32 - Step 6: Final answer
x = 90,358.69
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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.