Finding the Fourth Proportional to 128,455,728.27, 177,269,079.20 and 69,718,395.21
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Solution
The fourth proportional to 128,455,728.27, 177,269,079.20 and 69,718,395.21 is: 96,211,479.93
Step by Step Solution
- Step 1: Write the proportion equation
128,455,728.27 : 177,269,079.20 = 69,718,395.21 : x - Step 2: Convert to fraction form
128,455,728.27/177,269,079.20 = 69,718,395.21/x - Step 3: Cross multiply
128,455,728.27x = 177,269,079.20 × 69,718,395.21 - Step 4: Simplify right side
128,455,728.27x = 12,358,915,721,829,796 - Step 5: Solve for x
x = 12,358,915,721,829,796/128,455,728.27 - Step 6: Final answer
x = 96,211,479.93
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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.