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Finding the Fourth Proportional to 70,839.80, 106,317.30 and 68,535.80

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Solution

The fourth proportional to 70,839.80, 106,317.30 and 68,535.80 is: 102,859.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,839.80 : 106,317.30 = 68,535.80 : x
  2. Step 2: Convert to fraction form
    70,839.80/106,317.30 = 68,535.80/x
  3. Step 3: Cross multiply
    70,839.80x = 106,317.30 × 68,535.80
  4. Step 4: Simplify right side
    70,839.80x = 7,286,541,209.34
  5. Step 5: Solve for x
    x = 7,286,541,209.34/70,839.80
  6. Step 6: Final answer
    x = 102,859.43

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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.