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Finding the Fourth Proportional to 67,219.88, 100,831.64 and 20,472.75

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Solution

The fourth proportional to 67,219.88, 100,831.64 and 20,472.75 is: 30,709.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,219.88 : 100,831.64 = 20,472.75 : x
  2. Step 2: Convert to fraction form
    67,219.88/100,831.64 = 20,472.75/x
  3. Step 3: Cross multiply
    67,219.88x = 100,831.64 × 20,472.75
  4. Step 4: Simplify right side
    67,219.88x = 2,064,300,855.45
  5. Step 5: Solve for x
    x = 2,064,300,855.45/67,219.88
  6. Step 6: Final answer
    x = 30,709.68

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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.