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Finding the Fourth Proportional to 132,912.80, 199,077.60 and 118,138.40

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Solution

The fourth proportional to 132,912.80, 199,077.60 and 118,138.40 is: 176,948.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,912.80 : 199,077.60 = 118,138.40 : x
  2. Step 2: Convert to fraction form
    132,912.80/199,077.60 = 118,138.40/x
  3. Step 3: Cross multiply
    132,912.80x = 199,077.60 × 118,138.40
  4. Step 4: Simplify right side
    132,912.80x = 23,518,709,139.84
  5. Step 5: Solve for x
    x = 23,518,709,139.84/132,912.80
  6. Step 6: Final answer
    x = 176,948.41

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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.