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Finding the Fourth Proportional to 67,238.54, 100,857.71 and 20,491.41

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Solution

The fourth proportional to 67,238.54, 100,857.71 and 20,491.41 is: 30,737.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,238.54 : 100,857.71 = 20,491.41 : x
  2. Step 2: Convert to fraction form
    67,238.54/100,857.71 = 20,491.41/x
  3. Step 3: Cross multiply
    67,238.54x = 100,857.71 × 20,491.41
  4. Step 4: Simplify right side
    67,238.54x = 2,066,717,001.45
  5. Step 5: Solve for x
    x = 2,066,717,001.45/67,238.54
  6. Step 6: Final answer
    x = 30,737.09

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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.