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Finding the Fourth Proportional to 117,372.80, 176,059.20 and 115,428.80

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Solution

The fourth proportional to 117,372.80, 176,059.20 and 115,428.80 is: 173,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,372.80 : 176,059.20 = 115,428.80 : x
  2. Step 2: Convert to fraction form
    117,372.80/176,059.20 = 115,428.80/x
  3. Step 3: Cross multiply
    117,372.80x = 176,059.20 × 115,428.80
  4. Step 4: Simplify right side
    117,372.80x = 20,322,302,184.96
  5. Step 5: Solve for x
    x = 20,322,302,184.96/117,372.80
  6. Step 6: Final answer
    x = 173,143.20

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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.