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Finding the Fourth Proportional to 69,000.20, 103,500.30 and 66,375.80

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Solution

The fourth proportional to 69,000.20, 103,500.30 and 66,375.80 is: 99,563.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,000.20 : 103,500.30 = 66,375.80 : x
  2. Step 2: Convert to fraction form
    69,000.20/103,500.30 = 66,375.80/x
  3. Step 3: Cross multiply
    69,000.20x = 103,500.30 × 66,375.80
  4. Step 4: Simplify right side
    69,000.20x = 6,869,915,212.74
  5. Step 5: Solve for x
    x = 6,869,915,212.74/69,000.20
  6. Step 6: Final answer
    x = 99,563.70

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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.