Finding the Fourth Proportional to 128,259,900.80, 176,993,921.24 and 69,521,304.78
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Solution
The fourth proportional to 128,259,900.80, 176,993,921.24 and 69,521,304.78 is: 95,936,830.34
Step by Step Solution
- Step 1: Write the proportion equation
128,259,900.80 : 176,993,921.24 = 69,521,304.78 : x - Step 2: Convert to fraction form
128,259,900.80/176,993,921.24 = 69,521,304.78/x - Step 3: Cross multiply
128,259,900.80x = 176,993,921.24 × 69,521,304.78 - Step 4: Simplify right side
128,259,900.80x = 12,304,848,342,733,356 - Step 5: Solve for x
x = 12,304,848,342,733,356/128,259,900.80 - Step 6: Final answer
x = 95,936,830.34
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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.