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Finding the Fourth Proportional to 70,380.87, 105,573.06 and 20,461.41

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Solution

The fourth proportional to 70,380.87, 105,573.06 and 20,461.41 is: 30,692.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,380.87 : 105,573.06 = 20,461.41 : x
  2. Step 2: Convert to fraction form
    70,380.87/105,573.06 = 20,461.41/x
  3. Step 3: Cross multiply
    70,380.87x = 105,573.06 × 20,461.41
  4. Step 4: Simplify right side
    70,380.87x = 2,160,173,665.61
  5. Step 5: Solve for x
    x = 2,160,173,665.61/70,380.87
  6. Step 6: Final answer
    x = 30,692.63

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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.