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Finding the Fourth Proportional to 70,910.40, 106,314.40 and 39,755.20

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Solution

The fourth proportional to 70,910.40, 106,314.40 and 39,755.20 is: 59,604.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,910.40 : 106,314.40 = 39,755.20 : x
  2. Step 2: Convert to fraction form
    70,910.40/106,314.40 = 39,755.20/x
  3. Step 3: Cross multiply
    70,910.40x = 106,314.40 × 39,755.20
  4. Step 4: Simplify right side
    70,910.40x = 4,226,550,234.88
  5. Step 5: Solve for x
    x = 4,226,550,234.88/70,910.40
  6. Step 6: Final answer
    x = 59,604.10

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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.