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Finding the Fourth Proportional to 70,744.60, 106,105.34 and 20,813.02

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Solution

The fourth proportional to 70,744.60, 106,105.34 and 20,813.02 is: 31,216.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,744.60 : 106,105.34 = 20,813.02 : x
  2. Step 2: Convert to fraction form
    70,744.60/106,105.34 = 20,813.02/x
  3. Step 3: Cross multiply
    70,744.60x = 106,105.34 × 20,813.02
  4. Step 4: Simplify right side
    70,744.60x = 2,208,372,563.53
  5. Step 5: Solve for x
    x = 2,208,372,563.53/70,744.60
  6. Step 6: Final answer
    x = 31,216.13

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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.