Finding the Fourth Proportional to 154,070,830.71, 212,620,336.84 and 83,508,678.12
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Solution
The fourth proportional to 154,070,830.71, 212,620,336.84 and 83,508,678.12 is: 115,243,379.87
Step by Step Solution
- Step 1: Write the proportion equation
154,070,830.71 : 212,620,336.84 = 83,508,678.12 : x - Step 2: Convert to fraction form
154,070,830.71/212,620,336.84 = 83,508,678.12/x - Step 3: Cross multiply
154,070,830.71x = 212,620,336.84 × 83,508,678.12 - Step 4: Simplify right side
154,070,830.71x = 17,755,643,270,937,540 - Step 5: Solve for x
x = 17,755,643,270,937,540/154,070,830.71 - Step 6: Final answer
x = 115,243,379.87
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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.