Finding the Fourth Proportional to 128,434,468.66, 177,239,686.89 and 73,431,476.98
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Solution
The fourth proportional to 128,434,468.66, 177,239,686.89 and 73,431,476.98 is: 101,335,506.92
Step by Step Solution
- Step 1: Write the proportion equation
128,434,468.66 : 177,239,686.89 = 73,431,476.98 : x - Step 2: Convert to fraction form
128,434,468.66/177,239,686.89 = 73,431,476.98/x - Step 3: Cross multiply
128,434,468.66x = 177,239,686.89 × 73,431,476.98 - Step 4: Simplify right side
128,434,468.66x = 13,014,971,987,805,442 - Step 5: Solve for x
x = 13,014,971,987,805,442/128,434,468.66 - Step 6: Final answer
x = 101,335,506.92
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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.