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Finding the Fourth Proportional to 68,645.60, 102,859.05 and 50,930.90

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Solution

The fourth proportional to 68,645.60, 102,859.05 and 50,930.90 is: 76,315.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,645.60 : 102,859.05 = 50,930.90 : x
  2. Step 2: Convert to fraction form
    68,645.60/102,859.05 = 50,930.90/x
  3. Step 3: Cross multiply
    68,645.60x = 102,859.05 × 50,930.90
  4. Step 4: Simplify right side
    68,645.60x = 5,238,703,989.65
  5. Step 5: Solve for x
    x = 5,238,703,989.65/68,645.60
  6. Step 6: Final answer
    x = 76,315.22

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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.