Finding the Fourth Proportional to 128,259,899.79, 176,993,919.84 and 69,521,303.78
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Solution
The fourth proportional to 128,259,899.79, 176,993,919.84 and 69,521,303.78 is: 95,936,828.95
Step by Step Solution
- Step 1: Write the proportion equation
128,259,899.79 : 176,993,919.84 = 69,521,303.78 : x - Step 2: Convert to fraction form
128,259,899.79/176,993,919.84 = 69,521,303.78/x - Step 3: Cross multiply
128,259,899.79x = 176,993,919.84 × 69,521,303.78 - Step 4: Simplify right side
128,259,899.79x = 12,304,848,067,619,518 - Step 5: Solve for x
x = 12,304,848,067,619,518/128,259,899.79 - Step 6: Final answer
x = 95,936,828.95
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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.