Finding the Fourth Proportional to 157,295.79, 216,879.53 and 128,508.80
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Solution
The fourth proportional to 157,295.79, 216,879.53 and 128,508.80 is: 177,188.00
Step by Step Solution
- Step 1: Write the proportion equation
157,295.79 : 216,879.53 = 128,508.80 : x - Step 2: Convert to fraction form
157,295.79/216,879.53 = 128,508.80/x - Step 3: Cross multiply
157,295.79x = 216,879.53 × 128,508.80 - Step 4: Simplify right side
157,295.79x = 27,870,926,417.92 - Step 5: Solve for x
x = 27,870,926,417.92/157,295.79 - Step 6: Final answer
x = 177,188.00
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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.