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Finding the Fourth Proportional to 67,240.16, 100,879.68 and 20,500.64

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Solution

The fourth proportional to 67,240.16, 100,879.68 and 20,500.64 is: 30,756.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,240.16 : 100,879.68 = 20,500.64 : x
  2. Step 2: Convert to fraction form
    67,240.16/100,879.68 = 20,500.64/x
  3. Step 3: Cross multiply
    67,240.16x = 100,879.68 × 20,500.64
  4. Step 4: Simplify right side
    67,240.16x = 2,068,098,003.00
  5. Step 5: Solve for x
    x = 2,068,098,003.00/67,240.16
  6. Step 6: Final answer
    x = 30,756.89

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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.