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Finding the Fourth Proportional to 67,276.40, 100,919.40 and 20,529.20

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Solution

The fourth proportional to 67,276.40, 100,919.40 and 20,529.20 is: 30,795.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,276.40 : 100,919.40 = 20,529.20 : x
  2. Step 2: Convert to fraction form
    67,276.40/100,919.40 = 20,529.20/x
  3. Step 3: Cross multiply
    67,276.40x = 100,919.40 × 20,529.20
  4. Step 4: Simplify right side
    67,276.40x = 2,071,794,546.48
  5. Step 5: Solve for x
    x = 2,071,794,546.48/67,276.40
  6. Step 6: Final answer
    x = 30,795.26

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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.