Finding the Fourth Proportional to 128,981.23, 193,400.80 and 69,079.91
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Solution
The fourth proportional to 128,981.23, 193,400.80 and 69,079.91 is: 103,581.81
Step by Step Solution
- Step 1: Write the proportion equation
128,981.23 : 193,400.80 = 69,079.91 : x - Step 2: Convert to fraction form
128,981.23/193,400.80 = 69,079.91/x - Step 3: Cross multiply
128,981.23x = 193,400.80 × 69,079.91 - Step 4: Simplify right side
128,981.23x = 13,360,108,718.22 - Step 5: Solve for x
x = 13,360,108,718.22/128,981.23 - Step 6: Final answer
x = 103,581.81
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.