Finding the Fourth Proportional to 128,391,358.69, 177,180,418.42 and 69,654,023.81
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Solution
The fourth proportional to 128,391,358.69, 177,180,418.42 and 69,654,023.81 is: 96,122,739.17
Step by Step Solution
- Step 1: Write the proportion equation
128,391,358.69 : 177,180,418.42 = 69,654,023.81 : x - Step 2: Convert to fraction form
128,391,358.69/177,180,418.42 = 69,654,023.81/x - Step 3: Cross multiply
128,391,358.69x = 177,180,418.42 × 69,654,023.81 - Step 4: Simplify right side
128,391,358.69x = 12,341,329,083,292,442 - Step 5: Solve for x
x = 12,341,329,083,292,442/128,391,358.69 - Step 6: Final answer
x = 96,122,739.17
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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.