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Finding the Fourth Proportional to 117,687.90, 176,476.23 and 42,755.79

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Solution

The fourth proportional to 117,687.90, 176,476.23 and 42,755.79 is: 64,113.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,687.90 : 176,476.23 = 42,755.79 : x
  2. Step 2: Convert to fraction form
    117,687.90/176,476.23 = 42,755.79/x
  3. Step 3: Cross multiply
    117,687.90x = 176,476.23 × 42,755.79
  4. Step 4: Simplify right side
    117,687.90x = 7,545,380,629.87
  5. Step 5: Solve for x
    x = 7,545,380,629.87/117,687.90
  6. Step 6: Final answer
    x = 64,113.48

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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.