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Finding the Fourth Proportional to 67,385.21, 100,911.73 and 42,363.20

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Solution

The fourth proportional to 67,385.21, 100,911.73 and 42,363.20 is: 63,440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,385.21 : 100,911.73 = 42,363.20 : x
  2. Step 2: Convert to fraction form
    67,385.21/100,911.73 = 42,363.20/x
  3. Step 3: Cross multiply
    67,385.21x = 100,911.73 × 42,363.20
  4. Step 4: Simplify right side
    67,385.21x = 4,274,943,800.34
  5. Step 5: Solve for x
    x = 4,274,943,800.34/67,385.21
  6. Step 6: Final answer
    x = 63,440.39

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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.