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Finding the Fourth Proportional to 68,313.20, 102,469.80 and 40,319.60

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Solution

The fourth proportional to 68,313.20, 102,469.80 and 40,319.60 is: 60,479.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,313.20 : 102,469.80 = 40,319.60 : x
  2. Step 2: Convert to fraction form
    68,313.20/102,469.80 = 40,319.60/x
  3. Step 3: Cross multiply
    68,313.20x = 102,469.80 × 40,319.60
  4. Step 4: Simplify right side
    68,313.20x = 4,131,541,348.08
  5. Step 5: Solve for x
    x = 4,131,541,348.08/68,313.20
  6. Step 6: Final answer
    x = 60,479.40

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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.