Finding the Fourth Proportional to 208,182,421.71, 287,293,442.36 and 115,364,479.23
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Solution
The fourth proportional to 208,182,421.71, 287,293,442.36 and 115,364,479.23 is: 159,203,923.61
Step by Step Solution
- Step 1: Write the proportion equation
208,182,421.71 : 287,293,442.36 = 115,364,479.23 : x - Step 2: Convert to fraction form
208,182,421.71/287,293,442.36 = 115,364,479.23/x - Step 3: Cross multiply
208,182,421.71x = 287,293,442.36 × 115,364,479.23 - Step 4: Simplify right side
208,182,421.71x = 33,143,458,363,478,604 - Step 5: Solve for x
x = 33,143,458,363,478,604/208,182,421.71 - Step 6: Final answer
x = 159,203,923.61
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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.