Finding the Fourth Proportional to 128,366,868.72, 177,145,231.32 and 69,629,386.08
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Solution
The fourth proportional to 128,366,868.72, 177,145,231.32 and 69,629,386.08 is: 96,087,984.59
Step by Step Solution
- Step 1: Write the proportion equation
128,366,868.72 : 177,145,231.32 = 69,629,386.08 : x - Step 2: Convert to fraction form
128,366,868.72/177,145,231.32 = 69,629,386.08/x - Step 3: Cross multiply
128,366,868.72x = 177,145,231.32 × 69,629,386.08 - Step 4: Simplify right side
128,366,868.72x = 12,334,513,703,811,188 - Step 5: Solve for x
x = 12,334,513,703,811,188/128,366,868.72 - Step 6: Final answer
x = 96,087,984.59
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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.