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Finding the Fourth Proportional to 117,953.95, 176,755.96 and 86,636.11

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Solution

The fourth proportional to 117,953.95, 176,755.96 and 86,636.11 is: 129,825.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,953.95 : 176,755.96 = 86,636.11 : x
  2. Step 2: Convert to fraction form
    117,953.95/176,755.96 = 86,636.11/x
  3. Step 3: Cross multiply
    117,953.95x = 176,755.96 × 86,636.11
  4. Step 4: Simplify right side
    117,953.95x = 15,313,448,793.72
  5. Step 5: Solve for x
    x = 15,313,448,793.72/117,953.95
  6. Step 6: Final answer
    x = 129,825.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.