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Finding the Fourth Proportional to 100,797.21, 139,121.15 and 60,512.67

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Solution

The fourth proportional to 100,797.21, 139,121.15 and 60,512.67 is: 83,520.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,797.21 : 139,121.15 = 60,512.67 : x
  2. Step 2: Convert to fraction form
    100,797.21/139,121.15 = 60,512.67/x
  3. Step 3: Cross multiply
    100,797.21x = 139,121.15 × 60,512.67
  4. Step 4: Simplify right side
    100,797.21x = 8,418,591,937.41
  5. Step 5: Solve for x
    x = 8,418,591,937.41/100,797.21
  6. Step 6: Final answer
    x = 83,520.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.