Finding the Fourth Proportional to 153,586.74, 211,950.75 and 85,608.09
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Solution
The fourth proportional to 153,586.74, 211,950.75 and 85,608.09 is: 118,139.75
Step by Step Solution
- Step 1: Write the proportion equation
153,586.74 : 211,950.75 = 85,608.09 : x - Step 2: Convert to fraction form
153,586.74/211,950.75 = 85,608.09/x - Step 3: Cross multiply
153,586.74x = 211,950.75 × 85,608.09 - Step 4: Simplify right side
153,586.74x = 18,144,698,881.57 - Step 5: Solve for x
x = 18,144,698,881.57/153,586.74 - Step 6: Final answer
x = 118,139.75
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1.5x scale
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.