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Finding the Fourth Proportional to 103,103.80, 154,704.30 and 76,859.80

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Solution

The fourth proportional to 103,103.80, 154,704.30 and 76,859.80 is: 115,325.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,103.80 : 154,704.30 = 76,859.80 : x
  2. Step 2: Convert to fraction form
    103,103.80/154,704.30 = 76,859.80/x
  3. Step 3: Cross multiply
    103,103.80x = 154,704.30 × 76,859.80
  4. Step 4: Simplify right side
    103,103.80x = 11,890,541,557.14
  5. Step 5: Solve for x
    x = 11,890,541,557.14/103,103.80
  6. Step 6: Final answer
    x = 115,325.93

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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.