Finding the Fourth Proportional to 128,448.24, 177,259.08 and 71,859.72
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Solution
The fourth proportional to 128,448.24, 177,259.08 and 71,859.72 is: 99,166.70
Step by Step Solution
- Step 1: Write the proportion equation
128,448.24 : 177,259.08 = 71,859.72 : x - Step 2: Convert to fraction form
128,448.24/177,259.08 = 71,859.72/x - Step 3: Cross multiply
128,448.24x = 177,259.08 × 71,859.72 - Step 4: Simplify right side
128,448.24x = 12,737,787,856.26 - Step 5: Solve for x
x = 12,737,787,856.26/128,448.24 - Step 6: Final answer
x = 99,166.70
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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.