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Finding the Fourth Proportional to 90,469.80, 135,704.70 and 68,016.60

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Solution

The fourth proportional to 90,469.80, 135,704.70 and 68,016.60 is: 102,024.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,469.80 : 135,704.70 = 68,016.60 : x
  2. Step 2: Convert to fraction form
    90,469.80/135,704.70 = 68,016.60/x
  3. Step 3: Cross multiply
    90,469.80x = 135,704.70 × 68,016.60
  4. Step 4: Simplify right side
    90,469.80x = 9,230,172,298.02
  5. Step 5: Solve for x
    x = 9,230,172,298.02/90,469.80
  6. Step 6: Final answer
    x = 102,024.90

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1.5x scale

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.