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Finding the Fourth Proportional to 90,928.90, 136,305.86 and 46,576.54

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Solution

The fourth proportional to 90,928.90, 136,305.86 and 46,576.54 is: 69,819.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,928.90 : 136,305.86 = 46,576.54 : x
  2. Step 2: Convert to fraction form
    90,928.90/136,305.86 = 46,576.54/x
  3. Step 3: Cross multiply
    90,928.90x = 136,305.86 × 46,576.54
  4. Step 4: Simplify right side
    90,928.90x = 6,348,654,659.00
  5. Step 5: Solve for x
    x = 6,348,654,659.00/90,928.90
  6. Step 6: Final answer
    x = 69,819.99

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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.